BOOKI

OF the parts of animals some are simple: to wit, all such as divide into parts
uniform with themselves, as flesh into flesh; others are composite, such as
divide into parts not uniform with themselves, as, for instance, the hand does
1

not divide into hands ñor the face into faces.

And of such as these, some are called not parts merely, but limbs or members.
Such are those parts that, while entire in themselves, have within themselves
other diverse parts: as for instance, the head, foot, hand, the arm as a whole,
the chest; for these are all in themselves entire parts, and there are other diverse
parts belonging to them.
All those parts that do not subdivide into parts uniform with themselves are
composed of parts that do so subdivide, for instance, hand is composed of
flesh, sinews, and bones. Of animals, some resemble one another in all their
parts, while others have parts wherein they differ. Sometimes the parts are
identical in form or species, as, for instance, one man's nose or eye resembles
another man's nose or eye, flesh flesh, and bone bone; and in like manner with
a horse, and with all other animals which we reckon to be of one and the same
species: for as the whole is to the whole, so each to each are the parts severally.
In other cases the parts are identical, save only for a difference in the way of
excess or defect, as is the case in such animals as are of one and the same
genus. By ‘genus' I mean, for instance, Bird or Fish, for each of these is subject
to difference in respect of its genus, and there are many species of fishes and of
birds.
Within the limits of genera, most of the parts as a rule exhibit differences
through contrast of the property or accident, such as colour and shape, to which
they are subject: in that some are more and some in a less degree the subject of
the same property or accident; and also in the way of multitude or fewness,
magnitude or parvitude, in short in the way of excess or defect. Thus in some
the texture of the flesh is soft, in others firm; some have a long
1
bilí, others a short one; some have abundance of feathers, others have only a
small quantity. It happens further that some have parts that others have not: for
instance, some have spurs and others not, some have crests and others not; but
as a general rule, most parts and those that go to make up the bulk of the body
are either identícal with one another, or differ from one another in the way of
contrast and of excess and defect. For ‘the more’ and ‘the less' may be
represented as ‘excess' or ‘defect'.
Once again, we may have to do with animals whose parts are neither identical
in form ñor yet identical save for differences in the way of excess or defect: but
they are the same only in the way of analogy, as, for instance, bone is only
analogous to fish-bone, nail to hoof, hand to claw, and scale to feather; for what
the feather is in a bird, the scale is in a fish.
The parts, then, which animals severally possess are diverse from, or identical
with, one another in the fashion above descríbed. And they are so furthermore
in the way of local disposition: for many animals have identical organs that
differ in position; for instance, some have teats in the breast, others cióse to the
thighs.
Of the substances that are composed of parts uniform (or homogeneous) with
themselves, some are soft and moíst, others are dry and solid. The soft and
moist are such either absolutely or so long as they are in their natural
conditions, as, for instance, blood, serum, lard, suet, marrow, sperm, gall, milk
in such as have it flesh and the like; and also, in a different way, the
superfluities, as phlegm and the excretions of the belly and the bladder. The dry
and solid are such as sinew, skin, vein, hair, bone, gristle, nail, hom (a term
which as applied to the part involves an ambiguity, since the whole also by
virtue of its form is desígnated hom), and such parts as present an analogy to
these.
Animals differ from one another in their modes of subsistence, in their actions,
in their habits, and in their parts. Concerning these differences we shall first
speak in broad and general terms, and subsequently we shall treat of the same
with cióse reference to each particular genus.
Differences are manifested in modes of subsistence, in habits, in actions
performed. For instance, some animals live in water and others on land. And
of those that live in water some do so in one way, and some ¡n another: that is to
say, some live and feed in the water, take in and emit water, and cannot live if
deprived of water, as is the case with the great majority of fishes; others get their
food and spend their days in the water, but do not take in water but air, ñor do
they bring forth in the water. Many of these creatures are furnished with feet, as
the otter, the beaver, and the crocodile; some are furnished with wings, as the
diver and the grebe; some are destitute of feet, as the water-snake. Some
creatures get their living in the water and cannot exist outside it: but for all that
do not take in either air or water, as, for instance, the sea-nettle and the oyster.
And of creatures that live in the water some live in the sea, some in rivers, some
in lakes, and some in marshes, as the frog and the newt.
Of animals that live on dry land some take in air and emit it, which phenomena
are termed ‘inhalation' and ‘exhalation'; as, for instance, man and all such land
animals as are furnished with lungs. Others, again, do not inhale air, yet live and
find their sustenance on dry land; as, for instance, the wasp, the bee, and all other
insects. And by ‘insects’ I mean such creatures as have nicks or notches on their
bodies, either on their bellies or on both backs and bellies.
And of land animals many, as has been said, derive their subsistence from the
water; but of creatures that live in and inhale water not a single one derives its
subsistence from dry land.
Some animals at first live in water, and by and by change their shape and live out
of water, as is the case with river worms, for out of these the gadfly develops.
Furthermore, some animals are stationary, and some are erratic. Stationary
animals are found in water, but no such creature is found on dry land. In the
water are many creatures that live in cióse adhesión to an external object, as is
the case with several kinds of oyster. And, by the way, the sponge appears to be
endowed with a certain sensibility: as a proof of which it is alleged that the
difficulty in detaching it from its moorings is increased if the movement to
detach it be not covertly applied.
Other creatures adhere at one time to an object and detach themselves from ¡t at
other times, as is the case with a species of the so-called sea- nettle; for some of
these creatures seek their food in the night-time loose and unattached.
Many creatures are unattached but motionless, as is the case with oysters and
the so-called holothuria. Some can swim, as, for instance, fishes, molluscs, and
crustaceans, such as the crawfish. But some of these last move by walking, as
the crab, for it is the nature of the creature, though it lives in water, to move by
walking.
Of land animals some are furnished with wings, such as birds and bees, and
these are so furnished in different ways one from another; others are furnished
with feet. Of the animals that are furnished with feet some walk, some creep,
and some wriggle. But no creature is able only to move by flying, as the fish is
able only to swim, for the animals with leathern wings can walk; the bat has feet
and the seal has imperfect feet.
Some birds have feet of little power, and are therefore called Apodes. This little
bird is powerful on the wing; and, as a rule, birds that resemble it are weak-
footed and strong winged, such as the swallow and the drepanis or (?) Alpine
swift; for all these birds resemble one another in their habits and in their
plumage, and may easily be mistaken one for another. (The apus is to be seen at
all seasons, but the drepanis only after rainy weather in summer; for this is the
time when it is seen and captured, though, as a general rule, it is a rare bird.)
Again, some animals move by walking on the ground as well as by swimming in
water.
Furthermore, the following differences are manifest in their modes of living and
in their actions. Some are gregarious, some are solitary, whether they be
furnished with feet or wings or be fitted for a life in the water; and some partake
of both characters, the solitary and the gregarious. And of the gregarious, some
are disposed to combine for social purposes, others to live each for its own self.
Gregarious creatures are, among birds, such as the pigeon, the crane, and the
swan; and, by the way, no bird furnished with crooked talons is gregarious. Of
creatures that live in water many kinds of fishes are gregarious, such as the so-
called migrants, the tunny, the pelamys, and the bonito.
Man, by the way, presents a mixture of the two characters, the gregarious and
the solitary.
Social creatures are such as have some one common object in view; and this
property is not common to all creatures that are gregarious. Such social
creatures are man, the bee, the wasp, the ant, and the crane.
Again, of these social creatures some submit to a ruler, others are subject to no
governance: as, for instance, the crane and the several sorts of bee submit to a
ruler, whereas ants and numerous other creatures are every one his own master.
And again, both of gregarious and of solitary animals, some are attached to a
fixed home and others are erratic or nomad.
Also, some are carnivorous, some graminivorous, some omnivorous: whilst
some feed on a peculiar diet, as for instance the bees and the spiders, for the bee
lives on honey and certain other sweets, and the spider lives by catchingflies;
and some creatures live onfish. Again, some creatures catch their food, others
treasure it up; whereas others do not so.
Some creatures provide themselves with a dwelling, others go without one: of
the former kind are the mole, the mouse, the ant, the bee; of the latter kind are
many insects and quadrupeds. Further, in respect to locality of dwelling place,
some creatures dwell under ground, as the lizard and the snake; others live on
the surface of the ground, as the horse and the dog. make to themselves holes,
others do not
Some are nocturnal, as the owl and the bat; others live in the daylight.
Moreover, some creatures are tame and some are wild: some are at all times
tame, as man and the mulé; others are at all times savage, as the leopard and the
wolf; and some creatures can be rapidly tamed, as the elephant.
Again, we may regard animals ¡n another light. For, whenever a race of
animals ¡s found domesticated, the same is always to be found in a wild
condition; as we find to be the case with horses, kine, swine, (men), sheep,
goats, and dogs.
Further, some animals emít sound while others are mute, and some are
endowed with voice: of these latter some have articúlate speech, while others
are inarticulate; some are given to continual chirping and twittering some are
prone to silence; some are musical, and some unmusical; but all animals
without exception exercise their power of singing or chattering chiefly in
connexion with the intercourse of the sexes.
Again, some creatures live in the fields, as the cushat; some on the
mountains, as the hoopoe; some frequent the abodes of men, as the pigeon.
Some, again, are peculiarly salacious, as the partridge, the barn-door cock and
their congeners; others are inclined to chastity, as the whole tribe of crows, for
birds of this kind indulge but rarely in sexual intercourse.
Of marine animals, again, some live in the open seas, some near the shore,
some on rocks.
Furthermore, some are combative under offence; others are provident for
defence. Of the former kind are such as act as aggressors upon others or
retalíate when subjected to ill usage, and of the latter kind are such as merely
have some means of guarding themselves against attack.
Animals also differ from one another in regard to character in the following
respects. Some are good-tempered, sluggish, and little prone to ferocity, as the
ox; others are quicktempered, ferocious and unteachable, as the wild boar;
some are intelligent and timid, as the stag and the haré; others are mean and
treacherous, as the snake; others are noble and courageous and high-bred, as
the lion; others are thorough-bred and wild and treacherous, as the wolf: for, by
the way, an animal is highbred if it come from a noble stock, and an animal is
thorough-bred if it does not deflect from its racial characteristics.
Further, some are crafty and mischievous, as the fox; some are spirited and
affectionate and fawning, as the dog; others are easy-tempered and easily
domesticated, as the elephant; others are cautious and watchful, as the goose;
others are jealous and self-conceited, as the peacock. But of all animals man
alone is capable of deliberation.
Many animals have memory, and are capable of instruction; but no other creature
except man can recall the past at will.
With regard to the several genera of animals, particulars as to their habits of life
and modes of existence will be discussed more fully by and by.
Common to all animals are the organs whereby they take food and the organs
where into they take it; and these are either identical with one another, or are
diverse in the ways above specified: to wit, either identical in form, or varying in
respect of excess or defect, or resembling one another analogically, or differing in
position.
Furthermore, the great majority of animals have other organs besides these in
common, whereby they discharge the residuum of their food: I say, the great
majority, for this statement does not apply to all. And, by the way, the organ
whereby food is taken in is called the mouth, and the organ whereinto it is taken,
the belly; the remainder of the alimentary system has a great variety of ñames.
Now the residuum of food is twofold in kind, wet and dry, and such creatures as
have organs receptive of wet residuum are invariably found with organs receptive
of dry residuum; but such as have organs receptive of dry residuum need not
possess organs receptive of wet residuum. In other words, an animal has a bowel
or intestine if it have a bladder; but an animal may have a bowel and be without a
bladder. And, by the way, I may here remark that the organ receptive of wet
residuum is termed ‘bladder', and the organ receptive of dry residuum ‘intestine
or ‘bowel'.
Of animals
3 otherwise, a great many have, besides the organs above- mentioned,
an organ for excretion of the sperm: and of animals capable of generation one
secretes into another, and the other into itself. The latter is termed ‘female’, and
the former ‘male’; but some animals have neither male ñor female.
Consequently, the organs connected with this function differ in form, for some
animals have a womb and others an organ analogous thereto. The above-
mentioned organs, then, are the most indispensable parts of animals; and with
some of them all animals without exception, and with others animals for the
most part, must needs be provided.
One sense, and one alone, is common to all animals-the sense of touch.
Consequently, there is no special ñame for the organ in which it has its seat; for
in some groups of animals the organ is ¡dentical, in others it is only analogous.
Every animal is supplied with moisture, and, if the animal be deprived of the
same by natural causes or artificial means, death ensues: further, every animal
has another part in which the moisture is contained. These parts are blood and
vein, and in other animals there is something to correspond; but in these latter
the parts are imperfect, being merely fibre and serum or lymph.
Touch has its seat in a part uniform and homogeneous, as in the flesh or
something of the kind, and generally, with animals supplied with blood, in the
parts charged with blood. In other animals it has its seat in parts analogous to
the parts3 charged with blood; but in all cases it is seated in parts that in their
texture are homogeneous.
The active faculties, on the contrary, are seated in the parts that are
heterogeneous: as, for instance, the business of preparing the food is seated in
the mouth, and the office of locomotion in the feet, the wings, or in organs to
correspond.
Again, some animals are supplied with blood, as man, the horse, and all such
animals as are, when full-grown, either destitute of feet, or two-footed, or four-
footed; other animals are bloodless, such as the bee and the wasp, and, of marine
animals, the cuttle-fish, the crawfish, and all such animals as have more than four
feet.
Again, some animals are vívíparous, others oviparous, others vermiparous or
‘grub-bearing'. Some are víviparous, such as man, the horse, the seal, and all
other animals that are hair-coated, and, of marine animals, the cetaceans, as the
dolphin, and the so-called Selachia. (Of these latter animals, some have a tubular
air-passage and no gills, as the dolphin and the whale: the dolphin with the air-
passage going through its back, the whale with the air-passage in its forehead;
others have uncovered gills, as the Selachia, the sharks and rays.)
What we term an egg is a certain completed result of conception out of which the
animal that is to be develops, and in such a way that in respect to its primitive
germ it comes from part only of the egg, while the rest serves for food as the
germ develops. A 'grub' on the other hand is a thing out of which in its entirety
the animal in its entirety develops, by differentiation and growth of the embryo.
Of viviparous animals, some hatch eggs in their own interior, as creatures of the
shark kind; others engender in their interior a live foetus, as man and the horse.
When the result of conception is perfected, with some animals a living creature is
brought forth, with others an egg is brought to light, with others a grub. Of the
eggs, some have egg-shells and are of two different colours within, such as birds’
eggs; others are soft-skinned and of uniform colour, as the eggs of animals of the
shark kind. Of the grubs, some are from the first capable of movement, others are
motionless. However, with regard to these phenomena we shall speak precisely
hereafter when we come to treat of Generation.
Furthermore, some animals have feet and some are destitute thereof. Of such as
have feet some animals have two, as is the case with men and birds, and with
men and birds only; some have four, as the lizard and the dog; some have more,
as the centipede and the bee; but allsoever that have feet have an even number
of them.
Of swimming creatures that are destitute of feet, some have winglets or fins, as
fishes: and of these some have four fins, two above on the back, two below on
the belly, as the gilthead and the basse; some have two only,-to wit, such as are
exceedingly long and smooth, as the eel and the conger; some have none at all,
as the muraena, but use the sea just as snakes use dry ground-and by the way,
snakes swim in water in just the same way. Of the shark-kind some have no
fins, such as those that are fíat and long-tailed, as the ray and the sting-ray, but
these fishes swim actually by the undulatory motion of their fíat bodies; the
fishing frog, however, has fins, and so likewise have all such fishes as have not
their fíat surfaces thinned off to a sharp edge.
Of those swimming creatures that appear to have feet, as is the case with the
molluscs, these creatures swim by the aid of their feet and their fins as well, and
they swim most rapidly backwards in the direction of the trunk, as is the case
with the cuttle-fish or sepia and the calamary; and, by the way, neither of these
latter can walk as the poulpe or octopus can.
The hard-skinned or crustaceous animals, like the crawfish, swim by the
instrumentality of their tail-parts; and they swim most rapidly tail foremost, by
the aid of the fins developed upon that member. The newt swims by means of
its feet and tail; and its tail resembles that of the sheatfish, to compare little with
great.
Of animals that can fly some are furnished with feathered wings, as the eagle
and the hawk; some are furnished with membranous wings, as the bee and the
cockchafer; others are furnished with leathern wings, as the flying fox and the
bat. All flying creatures possessed of blood have feathered wings or leathern
wings; the bloodless creatures have membranous wings, as insects. The
creatures that have feathered wings or leathern wings have
either two feet or no feet at all: for there are saíd to be certaín flying
serpents in Ethiopia that are destitute of feet.
Creatures that have feathered wings are classed as a genus under the ríame of
‘bird'; the other two genera, the leathern-winged and membrane-winged, are as
yet wíthout a generic title.
Of creatures that can fly and are bloodless some are coleopterous or sheath-
winged, for they have their wings in a sheath or shard, like the cockchafer and
the dung-beetle; others are sheathless, and of these latter some are dipterous
and some tetrapterous: tetrapterous, such as are comparatively large or have
their stings in the tail, dipterous, such as are comparatively small or have their
stings in front. The coleóptera are, without exception, devoid of stings; the
díptera have the sting in front, as the fly, the horsefly, the gadfly, and the gnat.
Bloodless animals as a general rule are inferior in point of size to blooded
animals; though, by the way, there are found in the sea some few bloodless
creatures of abnormal size, as in the case of certain molluscs. And of these
bloodless genera, those are the largest that dwell in milder climates, and those
that inhabit the sea are larger than those living on dry land or in fresh water.
All creatures that are capable of motion move with four or more points of
motíon; the blooded animals with four only: as, for instance, man with two
hands and two feet, birds with two wings and two feet, quadrupeds and fishes
severally with four feet and four fins. Creatures that have two wínglets or fins,
or that have none at all like serpents, move all the same with not less than four
points of motion; for there are four bends in their bodies as they move, or two
bends together with their fins. Bloodless and many footed animals,
whetherfurnished with wings orfeet, move with more than four points of
motion; as, for instance, the dayfly moves with four feet and four wings: and, I
may observe in passing, this creature is exceptional not only in regard to the
duration of its existence, whence it receives its ñame, but also because though a
quadruped it has wings also.
All animals move alike, four-footed and many-footed; ¡n other words, they all
move cross-corner-wise. And animals in general have two feet in advance; the
crab alone has four.
Very extensive genera of animals, into which other subdivisions fall, are the
following: one, of birds; one, of fishes; and another, of cetaceans. Now all
these creatures are blooded.
There is another genus of the hard-shell kind, which is called oyster; another of
the soft-shell kind, not as yet designated by a single term, such as the spiny
crawfish and the various kinds of crabs and lobsters; and another of molluscs,
as the two kinds of calamary and the cuttle-fish; that of insects is different. All
these latter creatures are bloodless, and such of them as have feet have a
goodly number of them; and of the insects some have wings as well as feet.
Of the other animals the genera are not extensive. For in them one species does
not comprehend many species; but in one case, as man, the species is simple,
admitting of no differentiation, while other cases admit of differentiation, but the
forms lack particular designations.
So, for instance, creatures that are qudapedal and unprovided with wings are
blooded without exception, but some of them are viviparous, and some
oviparous. Such as are viviparous are hair-coated, and such as are oviparous are
covered with a kind of tessellated hard substance; and the tessellated bits of this
substance are, as it were, similar in regard to position to a scale.
An animal that is blooded and capable of movement on dry land, but is naturally
unprovided with feet, belongs to the serpent genus; and animals of this genus are
coated with the tessellated horny substance. Serpents in general are oviparous;
the adder, an exceptional case, is viviparous: for not all viviparous animals are
hair-coated, and some fishes also are viviparous.
All animals, however, that are hair-coated are viviparous. For, by the way, one
must regard as a kind of hair such prickly hairs as hedgehogs and
porcupines carry; for these spines perform the office of hair, and not of feet as
is the case wíth similar parts of sea-urchins.
In the genus that combines all viviparous quadrupeds are many species, but
under no common appellation. They are only named as it were one by one, as
we say man, lion, stag, horse, dog, and so on; though, by the way, there is a
sort of genus that embraces all creatures that have bushy manes and bushy
tails, such as the horse, the ass, the mulé, the jennet, and the animals that are
called Hemioni in Syria,-from their externally resembling mules, though they
are not strictly of the same species. And that they are not so is proved by the
fact that they mate with and breed from one another. For all these reasons, we
must take animals species by species, and discuss their peculiarities severally’
These preceding statements, then, have been put forward thus in a general way,
as a kind of foretaste of the number of subjects and of the properties that we
have to consider in order that we may first get a clear notion of distinctive
character and common properties. By and by we shall discuss these matters
with greater minuteness.
After this we shall pass on to the discussion of causes. For to do this when the
investigaron of the details is complete is the proper and natural method, and
that whereby the subjects and the premisses of our argument will afterwards be
rendered plain.
In the first place we must look to the constituent parts of animals. For it is in a
way relative to these parts, first and foremost, that animals in their entirety
differ from one another: either in the fact that some have this or that, while
they have not that or this; or by peculiarities of position or of arrangement; or
by the differences that have been previously mentioned, depending upon
diversity of form, or excess or defect in this or that particular, on analogy, or
on contrasts of the accidental qualities.
To begin with, we must take into consideration the parts of Man. For, just as
each nation is wont to reckon by that monetary standard with which it is most
familiar, so must we do in other matters. And, of course, man is the animal
with which we are all of us the most familiar.
Now the parts are obvious enough to physical perception. However, with the
view of observing due order and sequence and of combining rational notions
with physical perception, we shall proceed to enumerate the parts: firstly, the
organic, and afterwards the simple or non-composite.
The chief parts into which the body as a whole is subdivided, are the head,
the neck, the trunk (extending from the neck to the privy parts), which is
called the thorax, two arms and two legs.
Of the parts of which the head is composed the hair-covered portion is called
the 'skull’. The front portion of it is termed ‘bregma' or 'sinciput', developed
after birth-for it is the last of all the bones in the body to acquire solidity,-the
hinder part is termed the 'occiput', and the part intervening between the sinciput
and the occiput is the ‘crown’. The brain lies underneath the sinciput; the
occiput is hollow. The skull consists entirely of thin bone, rounded in shape,
and contained within a wrapper of fleshless skin.
The skull has sutures: one, of circular form, in the case of women; in the case
of men, as a general rule, three meeting at a point. Instances have been known
of a man's skull devoid of suture altogether. In the skull the middle line, where
the hair parts, is called the crown or vertex. In some cases the parting is double;
that is to say, some men are double crowned, not in regard to the bony skull,
but in consequence of the double fall or set of the hair.
The part that lies under the skull is called the ‘face’: but in the case of man
only, for the term is not applied to a fish or to an ox. In the face the part
below the sinciput and between the eyes is termed the forehead. When men
have large foreheads, they are slow to move; when they have small ones,
they are fickle; when they have broad ones, they are apt to be distraught;
when they have foreheads rounded or bulging out, they are quick- tempered.
Underneath the forehead are two eyebrows. Straight eyebrows are a sign of
softness of disposition; such as curve in towards the nose, of harshness; such as
curve out towards the temples, of humour and dissimulation; such as are drawn
in towards one another, of jealousy.
Under the eyebrows come the eyes. These are naturally two in number.
Each of them has an upper and a lower eyelid, and the hairs on the edges of
these are termed ‘eyelashes’. The central part of the eye ¡ncludes the moist part
whereby visión is effected, termed the ‘pupil’, and the part surrounding it called
the ‘black’; the part outside this is the ‘white'. A part common to the upper and
lower eyelid is a pair of nicks or corners, one in the direction of the nose, and
the other in the direction of the temples. When these are long they are a sign of
bad disposition; if the side toward the nostril be fleshy and comb-like, they are
a sign of dishonesty.
All animals, as a general rule, are provided with eyes, exceptingthe
ostracoderms and other imperfect creatures; at all events, all viviparous animals
have eyes, with the exception of the mole. And yet one might assert that,
though the mole has not eyes in the full sense, yet it has eyes in a kind of a way.
For in point of absolute fact it cannot see, and has no eyes visible externally;
but when the outer skin is removed, it is found to have the place where eyes are
usually situated, and the black parts of the eyes rightly situated, and all the
place that is usually devoted on the outside to eyes: showing that the parts are
stunted in development, and the skin allowed to grow over.
Of the eye the white is pretty much the same in all creatures; but what is called
the black differs in various animals. Some have the rim black, some
distinctly blue, some greyish-blue, some greenish; and this last colour is the sign
of an excellent disposition, and is particularly well adapted for sharpness of
visión. Man is the only, or nearly the only, creature, that has eyes of diverse
colours. Animáis, as a rule, have eyes of one colour only. Some horses have blue
eyes.
Of eyes, some are large, some small, some medium-sized; of these, the medium-
sized are the best. Moreover, eyes sometimes protrude, sometimes recede,
sometimes are neither protruding ñor receding. Of these, the receding eye is in
all animals the most acute; but the last kind are the sign of the best disposition.
Again, eyes are sometimes inclined to wink under observation, sometimes to
remain open and staring, and sometimes are disposed neither to wink ñor stare.
The last kind are the sign of the best nature, and of the others, the latter kind
indicates impudence, and the former indecisión.
Furthermore, there is a portion of the head, whereby an animal hears, a part
incapable of breathing, the 'ear\ I say ‘incapable of breathing', for Alcmaeon is
mistaken when he says that goats inspire through their ears. Of the ear one part is
unnamed, the other part is called the ‘lobe'; and it is entirely composed of gristle
and flesh. The ear is constructed internally like the trumpet-shell, and the
innermost bone is like the ear itself, and into it at the end the sound makes its
way, as into the bottom of a jar. This receptacle does not communicate by any
passage with the brain, but does so with the palate, and a vein extends from the
brain towards it. The eyes also are connected with the brain, and each of them
lies at the end of a little vein. Of animals possessed of ears man is the only one
that cannot move this organ. Of creatures possessed of hearing, some have ears,
whilst others have none, but merely have the passages for ears visible, as, for
example, feathered animals or animals coated with horny tessellates.
Viviparous animals, with the exception of the seal, the dolphin, and those others
which after a similar fashion to these are cetaceans, are all provided with ears;
for, by the way, the shark-kind are also viviparous. Now, the seal
has the passages visible whereby it hears; but the dolphin can hear, but has no
ears, ñor yet any passages visible. But man alone is unable to move his ears,
and all other animals can move them. And the ears lie, with man, in the same
horizontal plañe with the eyes, and not in a plañe above them as is the case
with some quadrupeds. Of ears, some are fine, some are coarse, and some are
of médium texture; the last kind are best for hearing, but they serve in no way
to indícate character. Some ears are large, some small, some medium-sized;
again, some stand out far, some lie in cióse and tight, and some take up a
médium position; of these such as are of médium size and of médium position
are indications of the best disposition, while the large and outstanding ones
indícate a tendency to irrelevant talk or chattering. The part intercepted
between the eye, the ear, and the crown is termed the ‘temple'. Again, there is a
part of the countenance that serves as a passage for the breath, the ‘nose'. For a
man inhales and exhales by this organ, and sneezing is effected by its means:
which last is an outward rush of collected breath, and is the only mode of
breath used as an ornen and regarded as supernatural. Both inhalation and
exhalation go right on from the nose towards the chest; and with the nostrils
alone and separately it is impossible to inhale or exhale, owing to the fact that
the inspiration and respiration take place from the chest along the windpipe,
and not by any portion connected with the head; and indeed it is possible for a
creature to live without using this process of nasal respiration.
Again, smelling takes place by means of the nose,-smelling, or the sensible
discrimination of odour. And the nostril admits of easy motion, and is not, like
the ear, intrinsically immovable. A part of it, composed of gristle, constitutes, a
septum or partition, and part is an open passage; for the nostril consists of two
separate channels. The nostril (or nose) of the elephant is long and strong, and
the animal uses it like a hand; for by means of this organ it draws objects
towards it, and takes hold of them, and introduces its food into its mouth,
whether liquid or dry food, and it is the only living creature that does so.
Furthermore, there are two jaws; the front part of them constitutes the chin, and
the hinder part the cheek. All animals move the lower jaw, with the exception
of the river crocodile; this creature moves the upper jaw only.
Next after the nose come two lips, composed of flesh, and facile of motion. The
mouth lies inside the jaws and lips. Parts of the mouth are the roof or palate and
the pharynx.
The part that is sensible of taste is the tongue. The sensation has its seat at the
tip of the tongue; if the object to be tasted be placed on the fíat surface of the
organ, the taste is less sensibly experienced. The tongue is sensitive in all other
ways wherein flesh in general is so: that is, it can appreciate hardness, or
warmth and coid, in any part of it, just as it can appreciate taste. The tongue is
sometimes broad, sometimes narrow, and sometimes of médium width; the last
kind is the best and the clearest in its discrimination of taste. Moreover, the
tongue is sometimes loosely hung, and sometimes fastened: as in the case of
those who mumble and who lisp.
The tongue consists of flesh, soft and spongy, and the so-called ‘epiglottis’ is a
part of this organ.
That part of the mouth that splits into two bits is called the ‘tonsils’; that part
that splits into many bits, the ‘gums'. Both the tonsils and the gums are
composed of flesh. In the gums are teeth, composed of bone.
Inside the mouth is another part, shaped like a bunch of grapes, a pillar streaked
with veins. If this pillar gets relaxed and inflamed it is called ‘uvula* or ‘bunch
of grapes', and it then has a tendency to bring about suffocation.
The neck is the part between the face and the trunk. Of this the front part is the
larynx land the back part the ur The front part, composed of gristle, through
which respiration and speech is effected, is termed the ‘windpipe'; the part that
is fleshy is the oesophagus, inside just in front of the chine. The part to the back
of the neck is the epomis, or ‘shoulder-point'.
These then are the parts to be met with before you come to the thorax.
To the trunk there is a front part and a back part. Next after the neck in the front
part is the chest, with a pair of breasts. To each of the breasts is attached a teat
or nipple, through which in the case of females the milk
percolates; and the breast is of a spongy texture. Milk, by the way, is found at
times in the male; but with the male the flesh of the breast is tough, with the
female it is soft and porous.
Next after the thorax and in front comes the ‘belly’, and its root the ‘navel’.
Underneath this root the bilateral part is the ‘flank’: the undivided part below
the navel, the ‘abdomen’, the extremity of which is the región of the ‘pubes';
above the navel the ‘hypochondrium’; the cavity common to the
hypochondrium and the flank is the gut-cavity.
Serving as a brace girdle to the hinder parts is the pelvis, and henee it gets its
ñame (osphus), for it is symmetrical (isophues) in appearance; of the
fundament the part for resting on is termed the ‘rump’, and the part whereon
the thigh pivots is termed the ‘socket’ (or acetabulum).
The ‘womb’ is a part peculiar to the female; and the ‘penis’ is peculiar to the
male. This latter organ is external and situated at the extremity of the trunk; it
is composed of two separate parts: of which the extreme part is fleshy, does not
alter in size, and is called the glans; and round about it is a skin devoid of any
specific title, which integument if it be cut asunder never grows together again,
any more than does the jaw or the eyelid. And the connexion between the latter
and the glans is called the frenum. The remaining part of the penis is composed
of gristle; it is easily susceptible of enlargement; and it protrudes and recedes
in the reverse directions to what is observable in the identical organ in cats.
Underneath the penis are two ‘testicles’, and the integument of these is a skin
that is termed the ‘scrotum’.
Testicles are not identical with flesh, and are not altogether diverse from it. But
by and by we shall treat in an exhaustive way regarding all such parts.
The privy part of the female is in character opposite to that of the male. In
other words, the part under the pubes is hollow or receding, and not, like
the male organ, protrudíng. Further, there ¡s an ‘urethra’ outside the womb;
which organ serves as a passage for the sperm of the male, and as an outlet for
Iiquid excretíon to both sexes).
The part common to the neck and chest is the ‘throat’; the ‘armpit' ¡s common to
side, arm, and shoulder; and the ‘groin’ is common to thigh and abdomen. The
part inside the thigh and buttocks is the ‘perineum', and the part outside the thigh
and buttocks is the ‘hypoglutis’.
The front parts of the trunk have now been enumerated.
The part behind the chest is termed the ‘back’.
Parts of the back are a pair of 'shoulderblades', the ‘back-bone’, and, underneath
on a level with the belly in the trunk, the ‘loíns\ Common to the upper and lower
part of the trunk are the Vibs’, eight on either side, for as to the so-called seven-
ribbed Ligyans we have not received any trustworthy evidence.
Man, then, has an upper and a lower part, a front and a back part, a right and a
left side. Now the right and the left side are pretty well alike in theír parts and
identical throughout, except that the left side is the weaker of the two; but the
back parts do not resemble the front ones, neither do the lower ones the upper:
only that these upper and lower parts may be said to resemble one another thus
far, that, if the face be plump or meagre, the abdomen is plump or meagre to
correspond; and that the legs correspond to the arms, and where the upper arm is
short the thigh is usually short also, and where the feet are small the hands are
small correspondingly.
Of the limbs, one set, forming a pair, is <arms\ To the arm belong the ‘shoulder',
‘upper-arm’, ‘elbow’, ‘fore-arm’, and ‘hand\ To the hand belong the ‘palm’, and
the five ‘fingers\ The part of the finger that bends is termed 'knuckle', the part
that is inflexible is termed the ‘phalanx’. The big finger or thumb is single-
jointed, the other fingers are double jointed. The bending both of the arm and of
the finger takes place from without inwards in all
cases; and the arm bends at the elbow. The inner part of the hand is termed the
palm', and is fleshy and divided by joints or lines: in the case of long-lived
people by one or two extending right across, in the case of the short-lived by
two, not so extending. The joint between hand and arm is termed the ‘wrist'.
The outside or back of the hand is sinewy, and has no specific designation.
There is another duplícate limb, the Meg\ Of this limb the double-knobbed part
is termed the ‘thigh-bone', the sliding part of the ‘kneecap', the double- boned
part the ‘leg'; the front part of this latter is termed the ‘shin', and the part behind
it the ‘calf', wherein the flesh is sinewy and venous, in some cases drawn
upwards towards the hollow behind the knee, as in the case of people with large
hips, and in other cases drawn downwards. The lower extremity of the shin is
the ‘ankle', duplícate in eíther leg. The part of the limb that contains a
multiplicity of bones is the ‘foot'. The hinder part of the foot is the ‘heel'; at the
front of it the divided part consists of ‘toes', five in number; the fleshy part
underneath is the ‘ball'; the upper part or back of the foot is sinewy and has no
particular appellation; of the toe, one portion is the ‘naiT and another the
‘joint', and the nail is in all cases at the extremity; and toes are without
exception single jointed. Men that have the inside or solé of the foot clumsy
and not arched, that is, that walk resting on the entire under-surface of their
feet, are prone to roguery. The joint common to thigh and shin is the ‘knee'.
These, then, are the parts common to the male and the female sex. The relative
position of the parts as to up and down, or to front and back, or to right and left,
all this as regards externáis might safely be left to mere ordinary perception.
But for all that, we must treat of them for the same reason as the one previously
brought forward; that is to say, we must refer to them in order that a due and
regular sequence may be observed in our exposition, and in order that by the
enumeration of these obvious facts due attention may be subsequently given to
those parts in men and other animals that are diverse in any way from one
another.
In man, above all other animals, the terms ‘upper' and ‘lower' are used in
harmony with their natural positions; for in him, upper and lower have the
same meaning as when they are applied to the universe as a whole. In like
manner the terms, ‘in front', ‘behincT, ‘right’ and ‘left’, are used in accordance
with their natural sense. But in regard to other anímals, in some cases these
distinctions do not exist, and in others they do so, but in a vague way. For
instance, the head with all animals is up and above in respect to their bodies; but
man alone, as has been said, has, in maturity, this part uppermost in respect to
the material universe.
Next after the head comes the neck, and then the chest and the back: the one in
front and the other behind. Next after these come the belly, the loins, the sexual
parts, and the haunches; then the thigh and shin; and, lastly, the feet.
The legs bend frontwards, in the direction of actual progression, and frontwards
also lies that part of the foot which is the most effective of motion, and the
flexure of that part; but the heel lies at the back, and the anklebones lie laterally,
earwise. The arms are situated to right and left, and bend inwards: so that the
convexities formed by bent arms and legs are practically face to face with one
another in the case of man.
As for the senses and for the organs of sensation, the eyes, the nostrils, and the
tongue, all alike are situated frontwards; the sense of hearing, and the organ of
hearing, the ear, is situated sideways, on the same horizontal plañe with the
eyes. The eyes in man are, in proportion to his size, nearer to one another than in
any other animal.
Of the senses man has the sense of touch more refined than any animal, and so
also, but in less degree, the sense of taste; in the development of the other senses
he is surpassed by a great number of animals.
The parts, then, that are externally visible are arranged in the way above
stated, and as a rule have their special designations, and from use and wont are
known familiarly to all; but this is not the case with the inner parts. For the
fact is that the inner parts of man are to a very great extent unknown, and the
consequence is that we must have recourse to an examination of
the inner parts of other animals whose nature in any way resembles that of man.
In the first place then, the brain lies in the front part of the head. And this holds
alike with all animals possessed of a brain; and all blooded animals are
possessed thereof, and, by the way, molluscs as well. But, taking size for size of
animal, the largest brain, and the moistest, is that of man. Two membranes
endose it: the stronger one near the bone of the skull; the inner one, round the
brain itself, is finer. The brain in all cases is bilateral. Behind this, right at the
back, comes what is termed the ‘cerebellum', differing in form from the brain as
we may both feel and see.
The back of the head is with all animals empty and hollow, whatever be its size
in the different animals. For some creatures have big heads while the face below
is small in proportion, as is the case with round-faced animals; some have little
heads and long jaws, as is the case, without exception, among animals of the
mane-and-tail species.
The brain in all animals is bloodless, devoid of veins, and naturally coid to the
touch; in the great majority of animals it has a small hollow in its centre. The
brain-caul around it is reticulated with veins; and this brain-caul is that skin-
like membrane which closely surrounds the brain. Above the brain is the
thinnest and weakest bone of the head, which is termed or 'sinciput'.
From the eye there go three ducts to the brain: the largest and the medium- sized
to the cerebellum, the least to the brain itself; and the least is the one situated
nearest to the nostril. The two largest ones, then, run side by side and do not
meet; the medium-sized ones meet-and this is particularly visible in fishes,-
forthey lie nearer than the large ones to the brain; the smallest pair are the most
widely separate from one another, and do not meet.
Inside the neck is what is termed the oesophagus (whose other ñame is derived
oesophagus from its length and narrowness), and the windpipe. The windpipe is
situated in front of the oesophagus in all animals that have a windpipe, and all
animals have one that are furnished with lungs. The windpipe is made up of
gristle, is sparingly supplied with blood, and is streaked all round with
numerous minute veins; it is situated, in its upper part, near the mouth, below
the aperture formed by the nostrils into the
mouth-an aperture through which, when men, in drinking, inhale any of the
liquid, this liquid finds its way out through the nostrils. In betwixt the two
openings comes the so-called epiglottis, an organ capable of being drawn over
and covering the orífice of the windpipe communicating with the mouth; the
end of the tongue is attached to the epiglottis. In the other direction the
windpipe extends to the interval between the lungs, and hereupon bifurcates
into each of the two divisions of the lung; for the lung in all animals possessed
of the organ has a tendency to be double. In viviparous animals, however, the
duplication is not so plainly discernible as in other species, and the duplication
is least discernible in man. And in man the organ is not split into many parts, as
is the case with some vivípara, neither is it smooth, but its surface is uneven.
In the case of the ovípara, such as birds and ovíparous quadrupeds, the two
parts of the organ are separated to a distance from one another, so that the
creatures appear to be furnished with a pair of lungs; and from the windpipe,
itself single, there branch off two separate parts extending to each of the two
divisions of the lung. It is attached also to the great vein and to what is
designated the ‘aorta’. When the windpipe is charged with air, the air passes on
to the hollow parts of the lung. These parts have divisions, composed of gristle,
which meet at an acute angle; from the divisions run passages through the entire
lung, giving off smaller and smaller ramifications. The heart also is attached to
the windpipe, by connexions of fat, gristle, and sinew; and at the point of
juncture there is a hollow. When the windpipe is charged with air, the entrance
of the air into the heart, though imperceptible in some animals, is perceptible
enough in the larger ones. Such are the properties of the windpipe, and it takes
in and throws out air only, and takes in nothing else either dry or liquid, or else
it causes you pain until you shall have coughed up whatever may have gone
down.
The oesophagus communicates at the top with the mouth, cióse to the windpipe,
and is attached to the backbone and the windpipe by membranous ligaments,
and at last finds its way through the midriff into the belly. It is composed of
flesh-like substance, and is elastic both lengthways and breadthways.
The stomach of man resembles that of a dog; for it is not much bigger than the
bowel, but is somewhat like a bowel of more than usual width; then comes the
bowel, single, convoluted, moderately wide. The lower part of the gut is like that
of a pig; for it is broad, and the part from it to the buttocks is thick and short. The
caul, or great omentum, is attached to the middle of the stomach, and consists of
a fatty membrane, as is the case with all other animals whose stomachs are single
and which have teeth in both jaws.
The mesentery is over the bowels; this also is membranous and broad, and turns
to fat. It is attached to the great vein and the aorta, and there run through it a
number of veins closely packed together, extending towards the región of the
bowels, beginning above and ending below.
So much for the properties of the oesophagus, the windpipe, and the
stomach.
The heart has three cavities, and is situated above the lung at the división of the
windpipe, and is provided with a fatty and thick membrane where it fastens on to
the great vein and the aorta. It lies with its tapering portion upon the aorta, and
this portion is similarly situated in relation to the chest in all animals that have a
chest. In all animals alike, in those that have a chest and in those that have none,
the apex of the heart points forwards, although this fact might possibly escape
notice by a change of position under dissection. The rounded end of the heart is
at the top. The apex is to a great extent fleshy and cióse in texture, and in the
cavities of the heart are sinews. As a rule the heart is situated in the middle of the
chest in animals that have a chest, and in man it is situated a little to the left-hand
side, leaning a little way from the división of the breasts towards the left breast in
the upper part of the chest.
The heart is not large, and in its general shape it is not elongated; in fact, it is
somewhat round in form: only, be it remembered, it is sharp-pointed at the
bottom. It has three cavities, as has been said: the right-hand one the largest
of the three, the left-hand one the least, and the middle one intermedíate in size.
All these cavities, even the two small ones, are connected by passages with the
lung, and this fact is rendered quite plain in one of the cavities. And below, at
the point of attachment, in the largest cavity there is a connexion with the great
vein (near which the mesentery lies); and in the middle one there is a
connexion with the aorta.
Canals lead from the heart into the lung, and branch off just as the windpipe
does, running all over the lung parallel with the passages from the windpipe.
The canals from the heart are uppermost; and there is no common passage, but
the passages through their having a common wall receive the breath and pass it
on to the heart; and one of the passages conveys it to the right cavity, and the
other to the left.
With regard to the great vein and the aorta we shall, by and by, treat of them
together in a discussion devoted to them and to them alone. In all animals that
are furnished with a lung, and that are both internally and externally viviparous,
the lung is of all organs the most richly supplied with blood; for the lung is
throughout spongy in texture, and along by every single pore in it go branches
from the great vein. Those who imagine it to be empty are altogether mistaken;
and they are led into their error by their observation of lungs removed from
animals under dissection, out of which organs the blood had all escaped
immediately after death.
Of the other internal organs the heart alone contains blood. And the lung has
blood not in itself but in its veins, but the heart has blood in itself; for in each
of its three cavities it has blood, but the thinnest blood is what it has in its
central cavity.
Under the lung comes the thoracic diaphragm or midriff, attached to the ribs,
the hypochondria and the backbone, with a thin membrane in the middle of it.
It has veins running through it; and the diaphragm in the case of man is thicker
in proportion to the size of his frame than in other animals.
Under the diaphragm on the right-hand side lies the Miver', and on the left-
hand side the ‘spleen', alike in all animals that are provided with these organs
in an ordinary and not preternatural way; for, be it observed, in some
quadrupeds these organs have been found in a transposed position. These
organs are connected with the stomach by the caul.
To outward view the spleen of man is narrow and long, resembling the self-
same organ in the pig. The liver in the great majority of animals is not provided
with a ‘gall-bladder'; but the latter is present in some. The liver of a man is
round-shaped, and resembles the same organ in the ox. And, by the way, the
absence above referred to of a gall-bladder is at times met with in the practice
of augury. For instance, in a certain district of the Chalcidic settlement in
Euboea the sheep are devoid of gall-bladders; and in Naxos nearly all the
quadrupeds have one so large that foreigners when they offer sacrifice with
such victims are bewildered with fright, under the impression that the
phenomenon is not due to natural causes, but bodes some mischief to the
individual offerers of the sacrifice.
Again, the liver is attached to the great vein, but it has no communication with
the aorta; for the vein that goes off from the great vein goes right through the
liver, at a point where are the so-called ‘portáis’ of the liver. The spleen also is
connected only with the great vein, for a vein extends to the spleen off from it.
After these organs come the ‘kidneys', and these are placed cióse to the
backbone, and resemble in characterthe same organ in kine. In all animals that
are provided with this organ, the right kidney is situated higher up than the
other. It has also less fatty substance than the left-hand one and is less moist.
And this phenomenon also is observable in all the other animals alike.
Furthermore, passages or ducts lead into the kidneys both from the great vein
and from the aorta, only not into the cavity. For, by the way, there is a cavity in
the middle of the kidney, bigger in some creatures and less in others; but there
is none in the case of the seal. This latter animal has kidneys resembling in
shape the identical organ in kine, but in its case the organs are more solid than
in any other known creature. The ducts that lead into the kidneys lose
themselves in the substance of the kidneys themselves; and the proof that they
extend no farther rests on the fact that they contain no blood, ñor is any clot
found therein. The kidneys, however, have, as has been said, a small cavity.
From this cavity in the kidney there lead two
considerable ducts or ureters into the bladder; and others springfrom the aorta,
strong and continuous. And to the middle of each of the two kidneys is attached
a hollow sinewy vein, stretching right along the spine through the narrows; by
and by these veins are lost in either loin, and again become visible extending to
the flank. And these off-branchings of the veins termínate in the bladder. For
the bladder lies at the extremity, and is held in position by the ducts stretching
from the kidneys, along the stalk that extends to the urethra; and pretty well all
round it is fastened by fine sinewy membranes, that resemble to some extent the
thoracic diaphragm. The bladder in man is, proportionately to his size, tolerably
large.
To the stalk of the bladder the prívate part is attached, the external orífices
coalescing; but a líttle lower down, one of the openings communícates with the
testicles and the other with the bladder. The penis is gristly and sinewy in its
texture. With it are connected the testicles in male animals, and the properties of
these organs we shall discuss in our general account of the said organ.
All these organs are similar in the female; for there is no difference in regard to
the internal organs, except in respect to the womb, and with reference to the
appearance of this organ I must refer the reader to diagrams in my <Anatomy\
The womb, however, is situated over the bowel, and the bladder lies over the
womb. But we must treat by and by in our pages of the womb of all female
animals viewed generally. For the wombs of all female animals are not
identical, neither do their local dispositions coincide.
These are the organs, internal and external, of man, and such is their nature and
such their local disposition.
BOOK 2
With regard to anímals in general, some parts or organs are common to all, as
has been said, and some are common only to particular genera; the parts,
moreover, are identical with or different from one another on the lines already
repeatedly laid down. For as a general rule all animals that are generically
distinct have the majoríty of their parts or organs different in form or species;
and some of them they have only analogically similar and diverse in kind or
genus, while they have others that are alike in kind but specifically diverse; and
many parts or organs exist in some animals, but not in others.
For instance, viviparous quadrupeds have all a head and a neck, and all the
parts or organs of the head, but they differ each from other in the shapes of the
parts. The lion has its neck composed of one single bone instead of vertebrae;
but, when dissected, the animal is found in all ¡nternal characters to resemble
the dog.
The quadrupedal vivípara instead of arms have forelegs. This is true of all
quadrupeds, but such of them as have toes have, practically speaking, organs
analogous to hands; at all events, they use these fore-limbs for many purposes
as hands. And they have the limbs on the left-hand side less distinct from those
on the right than man.
The fore-limbs then serve more or less the purpose of hands in quadrupeds,
with the exception of the elephant. This latter animal has its toes somewhat
indistinctly defined, and its front legs are much bigger than its hinder ones; it is
five-toed, and has short ankles to its hind feet. But it has a nose such in
properties and such in size as to allow of its using the same for a hand. For it
eats and drinks by lifting up its food with the aid of this organ into its mouth,
and with the same organ it lifts up articles to the driver on its back; with this
organ it can pluck up trees by the roots, and when walking through water it
spouts the water up by means of it; and this organ is capable of being
crooked or coiled at the tip, but not of flexing like a joint, for it is composed of
gristle.
Of all animals man alone can learn to make equal use of both hands.
All animals have a part analogous to the chest ¡n man, but not similar to his; for
the chest in man is broad, but that of all other animals is narrow. Moreover, no
other animal but man has breasts in front; the elephant, certainly, has two
breasts, not however in the chest, but near it.
Moreover, also, animals have the flexions of their fore and hind limbs in
directions opposite to one another, and in directions the reverse of those
observed in the arms and legs of man; with the exception of the elephant In
other words, with the viviparous quadrupeds the front legs bend forwards and
the hind ones backwards, and the concavities of the two pairs of limbs thus face
one another.
The elephant does not sleep standing, as some were wont to assert, but it bends
its legs and settles down; only that in consequence of its weight it cannot bend
its leg on both sides simultaneously, but falls into a recumbent position on one
side or the other, and in this position it goes to sleep. And it bends its hind legs
just as a man bends his legs.
In the case of the ovípara, as the crocodile and the lizard and the like, both pairs
of legs, fore and hind, bend forwards, with a slight swerve on one side. The
flexión is similar in the case of the multipeds; only that the legs in between the
extreme ends always move in a manner intermedíate between that of those in
front and those behind, and accordingly bend sideways rather than backwards
or forwards. But man bends his arms and his legs towards the same point, and
therefore in opposite ways: that is to say, he bends his arms backwards, with
just a slight inclination inwards, and his legs frontwards. No animal bends both
its fore-limbs and hind-limbs backwards; but in the case of all animals the
flexión of the shoulders is in the opposite direction to that of the elbows or the
joints of the forelegs, and the flexure in the hips to that of the knees of the hind-
legs: so that since man differs from other animals in flexión, those animals that
possess such parts as these move them contrariwise to man.
Bírds have the flexions of their limbs like those of the quadrupeds; for,
although bipeds, they bend their legs backwards, and instead of arms or front
legs have wings which bend frontwards.
The seal is a kind of imperfect or crippled quadruped; for just behind the
shoulder-blade its front feet are placed, resembling hands, like the front paws
of the bear; for they are furnished with five toes, and each of the toes has three
flexions and a nail of inconsiderable size. The hind feet are also furnished with
five toes; in their flexions and nails they resemble the front feet, and in shape
they resemble a fish’s tail.
The movements of animals, quadruped and multiped, are crosswise, or in
diagonals, and their equilibrium in standing posture is maintained crosswise;
and it is always the limb on the right-hand side that is the first to move. The
lion, however, and the two species of camels, both the Bactrian and the
Arabian, progress by an amble; and the action so called is when the animal
never overpasses the right with the left, but always follows cióse upon it.
Whatever parts men have in front, these parts quadrupeds have below, in or on
the belly; and whatever parts men have behind, these parts quadrupeds have
above on their backs. Most quadrupeds have a tail; for even the seal has a tiny
one resembling that of the stag. Regarding the tails of the pithecoids we must
give their distinctive properties by and by animal
All viviparous quadrupeds are hair-coated, whereas man has only a few short
hairs excepting on the head, but, so far as the head is concerned, he is hairier
than any other animal. Further, of hair-coated animals, the back is hairier than
the belly, which latter is either comparatively void of hair or smooth and void
of hair altogether. With man the reverse is the case.
Man also has upper and lower eyelashes, and hair under the armpits and on the
pubes. No other animal has hair in either of these localities, or has an under
eyelash; though in the case of some animals a few straggling hairs grow under
the eyelid.
Of hair-coated quadrupeds some are hairy all over the body, as the pig, the
bear, and the dog; others are especially hairy on the neck and all round about it,
as is the case with animals that have a shaggy mane, such as the
lion; others again are especially hairy on the upper surface of the neck from the
head as far as the withers, namely, such as have a crested mane, as in the case
with the horse, the mulé, and, among the undomesticated horned animals, the
bison.
The so-called hippelaphus also has a mane on its withers, and the animal called
pardion, in either case a thin mane extending from the head to the withers; the
hippelaphus has, exceptionally, a beard by the larynx. Both these animals have
horns and are cloven-footed; the female, however, of the hippelaphus has no
horns. This latter animal resembles the stag in size; it is found in the territory
of the Arachotae, where the wild cattle also are found. Wild cattle differ from
their domesticated congeners just as the wild boar differs from the
domesticated one. That is to say they are black, strong looking, with a hook-
nosed muzzle, and with horns lying more overthe back. The horns of the
hippelaphus resemble those of the gazelle.
The elephant, by the way, is the least hairy of all quadrupeds. With animals, as
a general rule, the tail corresponds with the body as regards thickness or
thinness of hair-coating; that is, with animals that have long tails, for some
creatures have tails of altogether insignificant size.
Camels have an exceptional organ wherein they differ from all other animals,
and that is the so-called ‘hump' on their back. The Bactrian camel differs from
the Arabian; for the former has two humps and the latter only one, though it
has, by the way, a kind of a hump below like the one above, on which, when it
kneels, the weight of the whole body rests. The camel has four teats like the
cow, a tail like that of an ass, and the privy parts of the male are directed
backwards. It has one knee in each leg, and the flexures of the limb are not
manifold, as some say, although they appear to be so from the constricted
shape of the región of the belly. It has a huckle-bone like that of kine, but
meagre and small in proportion to its bulk. It is cloven- footed, and has not got
teeth in both jaws; and it is cloven footed in the following way: at the back
there is a slight cleft extending as far up as the second joint of the toes; and in
front there are small hooves on the tip of the first joint of the toes; and a sort of
web passes across the cleft, as in geese. The foot is fleshy underneath, like that
of the bear; so that, when the animal goes to war, they protect its feet, when
they get sore, with sandals.
The legs of all quadrupeds are bony, sinewy, and fleshless; and in point of
fact such is the case with all animals that are furnished with feet, with the
exception of man. They are also unfurnished with buttocks; and this last point
is plain in an especial degree in birds. It is the reverse with man; for there is
scarcely any part of the body in which man is so fleshy as in the buttock, the
thigh, and the calf; for the part of the leg called gastroenemia or is fleshy.
Of blooded and viviparous quadrupeds some have the foot cloven into many
parts, as is the case with the hands and feet of man (for some animals, by the
way, are many-toed, as the lion, the dog, and the pard); others have feet cloven
in twain, and instead of nails have hooves, as the sheep, the goat, the deer, and
the hippopotamus; others are uncloven of foot, such for instance as the solid-
hooved animals, the horse and the mulé. Swine are either cloven-footed or
uncloven-footed; for there are in lllyria and in Paeonia and elsewhere solid-
hooved swine. The cloven-footed animals have two clefts behind; in the solid-
hooved this part is continuous and undivided.
Furthermore, of animals some are horned, and some are not so. The great
majority of the horned animals are cloven-footed, as the ox, the stag, the goat;
and a solid-hooved animal with a pair of horns has never yet been met with. But
a few animals are known to be singled-horned and single-hooved, as the Indian
ass; and one, to wit the oryx, is single horned and cloven- hooved.
Of all solid-hooved animals the Indian ass alone has an astragalus or huckle-
bone; for the pig, as was said above, is either solid-hooved or cloven-footed,
and consequently has no well-formed huckle-bone. Of the cloven footed many
are provided with a huckle-bone. Of the many-fingered or many-toed, no single
one has been observed to have a huckle-bone, none of the others any more than
man. The lynx, however, has something like a hemiastragal, and the lion
something resembling the sculptor's ‘labyrinth\ All the animals that have a
huckle-bone have it in the hinder legs. They have also the bone placed straight
up in the joint; the upper part, outside; the lower part, inside; the sides called
Coa turned towards one another, the sides called Chia outside, and the keraiae
or ‘horns’ on the top. This, then, is the position of the hucklebone in the case of
all animals provided with the part.
Some animals are, at one and the same time, furnished with a mane and
furnished also with a pair of horns bent in towards one another, as is the bison
(or aurochs), which is found in Paeonia and Maedica. But all animals that are
horned are quadrupedal, except in cases where a creature is said
metaphorically, or by a figure of speech, to have horns; just as the Egyptians
describe the serpents found in the neighbourhood of Thebes, while in point of
fact the creatures have merely protuberances on the head sufficiently large to
suggest such an epithet.
Of horned animals the deer alone has a horn, or antier, hard and solid
throughout. The horns of other animals are hollow for a certain distance, and
solid towards the extremity. The hollow part is derived from the skin, but the
core round which this is wrapped-the hard part-is derived from the bones; as is
the case with the horns of oxen. The deer is the only animal that sheds its
horns, and it does so annually, after reaching the age of two years, and again
renews them. All other animals retain their horns permanently, unless the horns
be damaged by accident.
Again, with regard to the breasts and the generative organs, animals differ
widely from one another and from man. For instance, the breasts of some
animals are situated in front, either in the chest or near to it, and there are in
such cases two breasts and two teats, as is the case with man and the elephant,
 35

as previously stated. For the elephant has two breasts in the región of the
axillae; and the female elephant has two breasts insignificant in size and in no
way proportionate to the bulk of the entire frame, in fact, so insignificant as to
be invisible in a sideways view; the males also have breasts, like the females,
exceedingly small. The she-bear has four breasts. Some animals have two
breasts, but situated near the thighs, and teats, likewise two in number, as the
sheep; others have four teats, as the cow. Some have breasts neither in the chest
ñor at the thighs, but in the belly, as the dog and pig; and they have a
considerable number of breasts or dugs, but not all of equal size. Thus the
shepard has four dugs in the belly, the lioness two, and others more. The she-
camel, also, has two dugs and four teats, like the cow. Of solid-hooved animals
the males have no dugs, excepting in the case of males that take after the
mother, which phenomenon is observable in horses.
Of male animals the genitals of some are external, as is the case with man, the
horse, and most other creatures; some are internal, as with the dolphin. With those
that have the organ externally placed, the organ in some cases is situated in front,
as in the cases already mentioned, and of these some have the organ detached,
both penis and testicles, as man; others have penis and testicles closely attached
to the belly, some more closely, some less; for this organ is not detached in the
wild boar ñor in the horse.
The penis of the elephant resembles that of the horse; compared with the size of
the animal it is disproportionately small; the testicles are not visible, but are
concealed inside in the vicinity of the kidneys; and for this reason the male
speedily gives over in the act of intercourse. The genitals of the female are
situated where the udder is in sheep; when she is in heat, she draws the organ
back and exposes it externally, to facilítate the act of intercourse for the male; and
the organ opens out to a considerable extent.
With most animals the genitals have the position above assigned; but some
animals discharge their uriñe backwards, as the lynx, the lion, the camel, and the
haré. Male animals differfrom one another, as has been said, in this particular, but
all female animals are retromingent: even the female elephant like other animals,
though she has the privy part below the thighs.
In the male organ itself there is a great diversity. For in some cases the organ is
composed of flesh and gristle, as in man; in such cases, the fleshy part does not
become inflated, but the gristly part is subject to enlargement. In other cases, the
organ is composed of fibrous tissue, as with the camel and the deer; in other cases
it is bony, as with the fox, the wolf, the marten, and the weasel; for this organ in
the weasel has a bone.
When man has arrived at maturity, his upper part is smaller than the lower one,
but with all other blooded animals the reverse holds good. By the ‘upper' part we
 35

mean all extending from the head down to the parts used for excretion of
residuum, and by the ‘lower' part else. With animals that have feet the hind legs
are to be rated as the lower part in our comparison of magnitudes, and with
animals devoid of feet, the tail, and the like.
When animals arrive at maturity, their properties are as above stated; but they
differ greatly from one another in their growth towards maturity. For
instance, man, when young, has his upper part largerthan the lower, but in
course of growth he comes to reverse this condition; and it is owing to this
circumstance that-an exceptional instance, by the way-he does not progress in
early life as he does at maturity, but in infancy creeps on all fours; but some
animals, in growth, retain the relative proportion of the parts, as the dog. Some
animals at first have the upper part smaller and the lower part larger, and in
course of growth the upper part gets to be the larger, as is the case with the
bushy-tailed animals such as the horse; for in their case there is never,
subsequently to birth, any increase in the part extending from the hoof to the
haunch.
Again, in respect to the teeth, animals differ greatly both from one another and
from man. All animals that are quadrupedal, blooded and viviparous, are
furníshed with teeth; but, to begin with, some are double-toothed (orfully
furníshed with teeth in both jaws), and some are not. For instance, horned
quadrupeds are not double-toothed; for they have not got the front teeth in the
upper jaw; and some hornless animals, also, are not double toothed, as the
camel. Some animals have tusks, like the boar, and some have not. Further,
some animals are saw-toothed, such as the lion, the pard, and the dog; and
some have teeth that do not interlock but have fíat opposing crowns, as the
horse and the ox; and by ‘saw-toothed' we mean such animals as interlock the
sharp-pointed teeth in one jaw between the sharp- pointed ones in the other.
No animal is there that possesses both tusks and horns, ñor yet do either of
these structures exist in any animal possessed of ‘saw-teeth’. The front teeth
are usually sharp, and the back ones blunt. The seal is saw-toothed throughout,
inasmuch as he is a sort of link with the class of fishes; forfishes are almost all
saw-toothed.
No animal of these genera is provided with double rows of teeth. There is,
however, an animal of the sort, if we are to believe Ctesias. He assures us that
the Indian wild beast called the ‘martichoras' has a triple row of teeth in both
upper and lower jaw; that it is as big as a lion and equally hairy, and that its
feet resemble those of the lion; that it resembles man in its face and ears; that
its eyes are blue, and its colour vermilion; that its tail is like that of the land-
scorpion; that it has a sting in the tail, and has the faculty of shootíng off
arrow-wíse the spines that are attached to the tail; that the
sound of its voice is a something between the sound of a pan-pipe and that of a
trumpet; that it can run as swiftly as deer, and that it is savage and a man-eater.
Man sheds his teeth, and so do other animals, as the horse, the mulé, and the
ass. And man sheds his front teeth; but there is no instance of an animal that
sheds its molars. The pig sheds none of its teeth at all.
With regard to dogs some doubts are entertained, as some contend that they
shed no teeth whatever, and others that they shed the canines, but those alone;
the fact being, that they do shed their teeth like man, but that the circumstance
escapes observation, owing to the fact that they never shed them until
equivalent teeth have grown within the gums to take the place of the shed
ones. We shall be justified in supposing that the case is similar with wild
beasts in general; for they are said to shed their canines only. Dogs can be
distinguished from one another, the youngfrom the oíd, by their teeth; for the
teeth in young dogs are white and sharp-pointed; in oíd dogs, black and blunt.
In this particular, the horse differs entirely from animals in general: for,
generally speaking, as animals grow older their teeth get blacker, but the horse's
teeth grow whiter with age.
The so-called ‘canines’ come in between the sharp teeth and the broad or
blunt ones, partaking of the form of both kinds; for they are broad at the base
and sharp at the tip.
Males have
3 more teeth than females in the case of men, sheep, goats, and
swine; in the case of other animals observations have not yet been made: but the
more teeth they have the more long-lived are they, as a rule, while those are
short-lived in proportion that have teeth fewer in number and thinly set.
The last teeth to come ¡n man are molars called ‘wisdom-teetlV, which come at
the age of twenty years, ¡n the case of both sexes. Cases have been known ¡n
women upwards. of eighty years oíd where at the very cióse of life the wisdom-
teeth have come up, causing great paín in their comíng; and cases have been
known of the like phenomenon ín men too. This happens, when it does happen,
in the case of people where the wisdom-teeth have not come up in early years.
The elephant has four teeth on either side, by which it munches its food,
grinding it like so much barley-meal, and, quite apart from these, it has its
great teeth, or tusks, two in number. In the male these tusks are
comparatively large and curved upwards; in the female, they are
comparatively small and point in the opposite direction; that is, they look
downwards towards the ground. The elephant is furnished with teeth at birth,
but the tusks are not then visible.
The tongue of the elephant is exceedingly small, and situated far back in the
mouth, so that it is difficult to get a sight of it.
Furthermore, animals differ from one another in the relative size of their
mouths.3In some animals the mouth opens wide, as is the case with the dog, the
lion, and with all the saw-toothed animals; other animals have small mouths, as
man; and others have mouths of médium capacity, as the pig and his congeners.
(The Egyptian hippopotamus has a mane like a horse, is cloven-footed like an
ox, and is snub-nosed. It has a huckle-bone like cloven-footed animals, and
tusks just visible; it has the tail of a pig, the neigh of a horse, and the
dimensions of an ass. The hide is so thick that spears are made out of it. In its
¡nternal organs it resembles the horse and the ass.)
Some animals share the properties of man and the quadrupeds, as the ape, the
monkey, and the baboon. The monkey is a tailed ape. The baboon resembles
the ape in form, only that it is bigger and stronger, more like a dog in face, and
is more savage in its habits, and its teeth are more dog-like and more powerful.
Apes are hairy on the back in keeping with their quadrupedal nature, and hairy
on the belly in keeping with their human form-for, as was said above, this
characteristic is reversed in man and the quadruped-only that the hair is coarse,
so that the ape is thickly coated both on the belly and on the back.
Its face resembles that of man in many respects; in other words, it has similar
nostrils and ears, and teeth like those of man, both front teeth and molars.
Further, whereas quadrupeds in general are not furnished with lashes on one of
the two eyelids, this creature has them on both, only very thinly set, especially
the under ones; in fact they are very insignificant indeed. And we must bear in
mind that all other quadrupeds have no under eyelash atall.
The ape has also in its chest two teats upon poorly developed breasts. It has
also arms like man, only covered with hair, and it bends these legs like man,
with the convexities of both limbs facing one another. In addition, it has hands
and fingers and nails like man, only that all these parts are somewhat more
beast-like in appearance. Its feet are exceptional in kind. That is, they are like
large hands, and the toes are like fingers, with the middle one the longest of all,
and the under part of the foot is like a hand except for its length, and stretches
out towards the extremities like the palm of the hand; and this palm at the after
end is unusually hard, and in a clumsy obscure kind of way resembles a heel.
The creature uses its feet either as hands or feet,
and doubles them up as one doubles a fist. Its upper-arm and thigh are short in
proportion to the forearm and the shin. It has no projecting navel, but only a
hardness in the ordinary locality of the navel. Its upper part is much larger than
its lower part, as ¡s the case with quadrupeds; in fact, the proportion of the
former to the latter is about as five to three. Owing to this circumstance and to
the fact that its feet resemble hands and are composed in a manner of hand and of
foot: of foot in the heel extremity, of the hand in all else-for even the toes have
what is called a ‘palm’r-for these reasons the animal is oftener to be found on all
fours than upright. It has neither hips, inasmuch as it is a quadruped, ñor yet a
tail, inasmuch as it is a biped, except ñor yet a tal by the way that it has a tail as
small as small can be, just a sort of indication of a tail. The genitals of the female
resemble those of the female in the human species; those of the male are more
like those of a dog than are those of a man.
The monkey, as has been observed, is furnished with a tail. In all such creatures
the internal organs are found under dissection to correspond to those of man.
So much then for the properties of the organs of such animals as bring forth their
young into the world alive.
Oviparous and blooded quadrupeds-and, by the way, no terrestrial blooded
animal is oviparous unless it is quadrupedal or is devoid of feet altogether- are
furnished with a head, a neck, a back, upper and under parts, the front legs and
hind legs, and the part analogous to the chest, all as in the case of viviparous
quadrupeds, and with a tail, usually large, in exceptional cases small. And all
these creatures are many-toed, and the several toes are cloven apart. Furthermore,
they all have the ordinary organs of sensation, including a tongue, with the
exception of the Egyptian crocodile.
This latter animal, by the way, resembles certain fishes. For, as a general rule,
fishes have a prickly tongue, not free in its movements; though there are some
fishes that present a smooth undifferentiated surface where the tongue should
be, until you open their mouths wide and make a cióse inspection.
Again, oviparous blooded quadrupeds are unprovided with ears, but possess
only the passage for hearing; neither have they breasts, ñor a copulatory organ,
ñor external testicles, but internal ones only; neither are they hair coated, but are
in all cases covered with scaly plates. Moreover, they are without exception
saw-toothed.
River crocodiles have pigs’ eyes, large teeth and tusks, and strong nails, and an
impenetrable skin composed of scaly plates. They see but poorly under water,
but above the surface of it with remarkable acuteness. As a rule, they pass the
day-time on land and the nighttime in the water; for the temperature of the
water is at night-time more genial than that of the open
The chameleon resembles the lizard in the general configuration of its body, but
the ribs stretch downwards and meet together under the belly as is the case with
fishes, and the spine sticks up as with the fish. Its face resembles that of the
baboon. Its tail is exceedingly long, terminates in a sharp point, and is for the
most part coiled up, like a strap of leather. It stands higher off the ground than
the lizard, but the flexure of the legs is the same in both creatures. Each of its
feet is divided into two parts, which bear the same relation to one another that
the thumb and the rest of the hand bear to one another in man. Each of these
parts is for a short distance divided after a fashion into toes; on the front feet the
inside part is divided into three and the outside into two, on the hind feet the
inside part into two and the outside into three; it has claws also on these parts
resembling those of birds of prey. Its body is rough all over, like that of the
crocodile. Its eyes are situated in a hollow recess, and are very large and round,
and are enveloped in a skin resembling that which covers the entire body; and in
the middle a
slight aperture ¡s left for visión, through which the animal sees, for it never
covers up this aperture with the cutaneous envelope. It keeps twisting its eyes
round and shifting its line of visión in every direction, and thus contrives to get
a sight of any object that it wants to see. The change in its colour takes place
when it is inflated with air; it is then black, not unlike the crocodile, or green
like the lizard but black-spotted like the pard. This change of colour takes place
over the whole body alike, for the eyes and the tail come alike under its
influence. In its movements it is very sluggish, like the tortoise. It assumes a
greenish hue in dying, and retains this hue after death. It resembles the lizard in
the position of the oesophagus and the windpipe. It has no flesh anywhere
except a few scraps of flesh on the head and on the jaws and near to the root of
the tail. It has blood only round about the heart, the eyes, the región above the
heart, and in all the veins extending from these parts; and in all these there is
but little blood after all. The brain is situated a little above the eyes, but
connected with them. When the outer skin is drawn aside from off the eye, a
something is found surrounding the eye, that gleams through like a thin ring of
copper. Membranes extend well nigh over its entire frame, numerous and
strong, and surpassing in respect of number and relative strength those found in
any other animal. After being cut open along its entire length it continúes to
breathe for a considerable time; a very slight motion goes on in the región of
the heart, and, while contraction is especially manifested in the neighbourhood
of the ribs, a similar motion is more or less discernible over the whole body. It
has no spleen visible. It hibernates, like the lizard.
Birds also in some parts resemble the above mentioned animals; that is to say,
they have in all cases a head, a neck, a back, a belly, and what is analogous to
the chest. The bird is remarkable among animals as having two feet, like man;
only, by the way, it bends them backwards as quadrupeds bend their hind legs,
as was noticed previously. It has neither hands ñor front feet, but wings-an
exceptional structure as compared with other animals. Its haunch-bone is long,
like a thigh, and is attached to the body as far as the middle of the belly; so like
to a thigh is it that when viewed
separately it looks like a real one, while the real thigh ¡s a separate structure
betwixt it and the shin. Of all birds those that have crooked talons have the
biggest thighs and the strongest breasts. All birds are furnished with many
claws, and all have the toes separated more or less asunder; that is to say, in the
greater part the toes are clearly distinct from one another, for even the
swimming birds, although they are web-footed, have still their claws fully
articulated and distinctly differentiated from one another. Birds that fly high in
air are in all cases four-toed: that is, the greater part have three toes in front and
one behind in place of a heel; some few have two in front and two behind, as
the wryneck.
Thís latter bird is somewhat bigger than the chaffinch, and is mottled in
appearance. It is peculiar in the arrangement of its toes, and resembles the
snake in the structure of its tongue; for the creature can protrude its tongue to
the extent of four finger-breadths, and then draw it back again.
Moreover, it can twist its head backwards while keeping all the rest of its body
still, like the serpent. It has big claws, somewhat resembling those of the
woodpecker. Its note is a shrill chirp.
Birds are furnished with a mouth, but with an exceptional one, for they have
neither lips ñor teeth, but a beak. Neither have they ears ñor a nose, but only
passages for the sensatíons connected with these organs: that for the nostríls in
the beak, and that for hearing in the head. Like all other animals they all have
two eyes, and these are devoid of lashes. The heavy-bodied (or gallinaceous)
birds cióse the eye by means of the lower lid, and all birds blink by means of a
skin extending over the eye from the inner córner; the owl and its congeners
also cióse the eye by means of the upper lid. The same phenomenon is
observable in the animals that are protected by horny scutes, as in the lizard
and its congeners; for they all without exception cióse the eye with the lower
lid, but they do not blink like birds. Further, birds have neither scutes ñor hair,
but feathers; and the feathers are invariably furnished with quills. They have no
tail, but a rump with tail-feathers, short in such as are long-legged and web-
footed, large in others. These latter kinds of birds fly with their feet tucked up
cióse to the belly; but the small rumped or short-tailed birds fly with their legs
stretched out at full length.
All are furnished with a tongue, but the organ is variable, being long in some
birds and broad in others. Certain species of birds above all other animals, and
next after man, possess the faculty of uttering articúlate sounds; and this faculty
is chiefly developed in broad-tongued birds. No oviparous creature has an
epiglottis over the windpipe, but these animals so manage the opening and
shutting of the windpipe as not to allow any solid substance to get down into
the lung.
Some species of birds are furnished additionally with spurs, but no bird with
crooked talons is found so provided. The birds with talons are among those that
fly well, but those that have spurs are among the heavy-bodied.
Again, some birds have a crest. As a general rule the crest sticks up, and is
composed of feathers only; but the crest of the barn-door cock is exceptional in
kind, for, whereas it is not just exactly flesh, at the same time it is not easy to
say what else it is.
Of water animals the genus of fishes constitutes a single group apart from the
rest, and including many diverse forms.
In the first place, the fish has a head, a back, a belly, in the neighbourhood of
which last are placed the stomach and viscera; and behind it has a tail of
continuous, undivided shape, but not, by the way, in all cases alike. No fish has
a neck, or any limb, or testicles at all, within or without, or breasts. But, by the
way this absence of breasts may predicated of all non-viviparous animals; and
in point of fact viviparous animals are not in all cases provided with the organ,
excepting such as are directly viviparous without being first oviparous. Thus
the dolphin is directly viviparous, and accordingly we find it furnished with
two breasts, not situated high up, but in the neighbourhood of the genitals. And
this creature is not provided, like quadrupeds, with visible teats, but has two
vents, one on each flank, from which the milk flows; and its young have to
follow after it to get suckled, and this phenomenon has been actually witnessed.
Fishes, then, as has been observed, have no breasts and no passage for the
genitals visible externally. But they have an exceptional organ in the gills,
whereby, after taking the water ¡n the mouth, they discharge it again; and in the
fins, of which the greater part have four, and the lanky ones two, as, for
instance, the eel, and these two sítuated near to the gills. In líke manner the
grey mullet-as, for instance, the mullet found ¡n the lake at Siphae-have only
two fins; and the same is the case with the fish called Ribbon-fish. Some of the
lanky fishes have no fins at all, such as the muraena, ñor gills articulated like
those of other fish.
And of those fish that are provided with gills, some have coverings for this
organ, whereas all the selachians have the organ unprotected by a cover. And
those fishes that have coverings or opercula for the gills have in all cases theír
gills placed sideways; whereas, among selachians, the broad ones have the gills
down below on the belly, as the torpedo and the ray, while the lanky ones have
the organ placed sideways, as is the case in all the dog-fish.
The fishing-frog has gills placed sideways, and covered not with a spiny
operculum, as in all but the selachian fishes, but with one of skin.
Morever, with fishes furnished with gills, the gills in some cases are simple in
others duplícate; and the last gilí in the direction of the body is always simple.
And, again, some fishes have few gills, and others have a great number; but all
alike have the same number on both sides. Those that have the least number
have one gilí on either side, and this one duplícate, like the boar-fish; others
have two on either side, one simple and the other duplícate, like the conger and
the scarus; others have four on either side, simple, as the elops, the synagris, the
muraena, and the eel; others have four, all, with the exception of the híndmost
one, in double rows, as the wrasse, the perch, the sheat-fish, and the carp. The
dog-fish have all their gills double, five on a side; and the sword-fish has eight
double gills. So much for the number of gills as found in fishes.
Again, fishes differ from other animals in more ways than as regards the gills.
For they are not covered with hairs as are viviparous land animals, ñor, as is the
case with certain oviparous quadrupeds, with tessellated scutes, ñor, like birds,
with feathers; but for the most part they are covered with scales. Some few are
rough-skinned, while the smooth-skinned are very few
indeed. Of the Selachia some are rough-skinned and some smooth-skinned; and
among the smooth-skinned fishes are included the conger, the eel, and
thetunny.
All fishes are saw-toothed excepting the scarus; and the teeth in all cases are
sharp and set in many rows, and in some cases are placed on the tongue. The
tongue is hard and spiny, and so firmly attached that fishes in many instances
seem to be devoid of the organ altogether. The mouth in some cases is wide-
stretched, as it is with some viviparous quadrupeds
With regard to organs of sense, all save eyes, fishes possess none of them,
neither the organs ñor their passages, neither ears ñor nostrils; but all fishes are
furnished with eyes, and the eyes devoid of lids, though the eyes are not hard;
with regard to the organs connected with the other senses, hearing and smell,
they are devoid alike of the organs themselves and of passages indicative of
them.
Fishes without exception are supplied with blood. Some of them are oviparous,
and some viviparous; scaly fish are invariably oviparous, but cartilaginous
fishes are all viviparous, with the single exception of the fishing-frog.
Of blooded animals there now remains the serpent genus. This genus is
common to both elements, for, while most species comprehended therein are
land animals, a small minority, to wit the aquatic species, pass their lives in
fresh water. There are also sea-serpents, in shape to a great extent resembling
their congeners of the land, with this exception that the head in their case is
somewhat like the head of the conger; and there are several kinds of sea-
serpent, and the different kinds differ in colour; these animals are not found in
very deep water. Serpents, like fish, are devoid of feet.
There are also sea-scolopendras, resembling in shape their land congeners, but
somewhat less in regard to magnitude. These creatures are found in the
neighbourhood of rocks; as compared with their land congeners they are redder
in colour, are furnished with feet in greater numbers and with legs of
more delicate structure. And the same remark applies to them as to the sea-
serpents, that they are not found in very deep water.
Of físhes whose habitat is in the vicinity of rocks there is a tiny one, which some
cali the Echeneis, or ‘ship-holder’, and which is by some people used as a charm
to bring luck in affairs of law and love. The creature is unfit for eating. Some
people assert that it has feet, but this is not the case: it appears, however, to be
furnished with feet from the fact that its fins resemble those organs.
So much, then, for the external parts of blooded animals, as regards their
numbers, their properties, and their relative diversities.
As for the properties of the internal organs, these we must first discuss in the case
of the animals that are supplied with blood. For the principal genera differ from
the rest of animals, in that the former are supplied with blood and the latter are
not; and the former include man, viviparous and oviparous quadrupeds, birds,
fishes, cetaceans, and all the others that come under no general designation by
reason of their not forming genera, but groups of which simply the specific ñame
is predicable, as when we say ‘the serpent,’ the ‘crocodile’.
All viviparous quadrupeds, then, are furnished with an oesophagus and a
windpipe, situated as in man; the same statement is applicable to oviparous
quadrupeds and to birds, only that the latter present diversities in the shapes of
these organs. As a general rule, all animals that take up air and breathe it in and
out are furnished with a lung, a windpipe, and an oesophagus, with the windpipe
and oesophagus not admitting of diversity in situation but admitting of diversity
in properties, and with the lung admitting of diversity in both these respects.
Further, all blooded animals have a heart and a diaphragm or midriff; but in small
animals the existence of the latter organ is not so obvious owing to its delicacy
and minute size.
In regard to the heart there is an exceptional phenomenon observable in oxen. In
other words, there is one species of ox where, though not in all
cases, a bone is found inside the heart. And, by the way, the horse's heart also
has a bone inside ¡t.
The genera referred to above are not in all cases furnished with a lung: for
instance, the fish is devoid of the organ, as is also every animal furnished with
gills. All blooded animals are furnished with a liver. As a general rule blooded
animals are furnished with a spleen; but with the great majority of non-
viviparous but oviparous animals the spleen is so small as all but to escape
observation; and this is the case with almost all birds, as with the pigeon, the
kite, the falcon, the owl: in point of fact, the aegocephalus is devoid of the
organ altogether. With oviparous quadrupeds the case is much the same as with
the viviparous; that is to say, they also have the spleen exceedingly minute, as
the tortoise, the freshwater tortoise, the toad, the lizard, the crocodile, and the
frog.
Some animals have a gall-bladder cióse to the liver, and others have not. Of
viviparous quadrupeds the deer is without the organ, as also the roe, the horse,
the mulé, the ass, the seal, and some kinds of pigs. Of deer those that are called
Achainae appear to have gall in their tail, but what is so called does resemble
gall in colour, though it is not so completely fluid, and the organ internally
resembles a spleen.
However, without any exception, stags are found to have maggots living inside
the head, and the habitat of these creatures is in the hollow underneath the root
of the tongue and in the neighbourhood of the vertebra to which the head is
attached. These creatures are as large as the largest grubs; they grow all
together in a cluster, and they are usually about twenty in number.
Deerthen, as has been observed, are without a gall-bladder; their gut, however,
is so bitter that even hounds refuse to eat it unless the animal is exceptionally
fat. With the elephant also the liver is unfurnished with a gall- bladder, but
when the animal is cut in the región where the organ is found in animals
furnished with it, there oozes out a fluid resembling gall, in greater or less
quantities. Of animals that take in sea-water and are furnished with a lung, the
dolphin is unprovided with a gall-bladder. Birds and fishes all have the organ,
as also oviparous quadrupeds, all to a greater or a lesser extent.
But of fishes some have the organ cióse to the liver, as the dogfishes, the sheat-
fish, the rhine or angel-fish, the smooth skate, the torpedo, and, of the lanky
fishes, the eel, the pipe-fish, and the hammer-headed shark. The callionymus,
also, has the gall-bladder cióse to the liver, and in no other fish does the organ
attain so great a relative size. Other fishes have the organ cióse to the gut,
attached to the liver by certain extremely fine ducts. The bonito has the gall-
bladder stretched alongside the gut and equalling it in length, and often a double
fold of it. others have the organ in the región of the gut; in some cases far off, in
others near; as the fishing-frog, the elops, the synagris, the muraena, and the
sword-fish. Often animals of the same species show this diversity of position; as,
for instance, some congers are found with the organ attached cióse to the liver,
and others with it detached from and below it. The case is much the same with
birds: that is, some have the gall-bladder cióse to the stomach, and others cióse
to the gut, as the pigeon, the raven, the quail, the swallow, and the sparrow;
some have it near at once to the liver and to the stomach as the aegocephalus;
others have it near at once to the liver and the gut, as the falcon and the kite.
Again, all viviparous quadrupeds are furnished with kidneys and a bladder.
Of the ovipara that are not quadrupedal there is no instance known of an animal,
whether fish or bird, provided with these organs. Of the ovipara that are
quadrupedal, the turtle alone is provided with these organs of a magnitude to
correspond with the other organs of the animal. In the turtle the kidney
resembles the same organ in the ox; that is to say, it looks one single organ
composed of a number of small ones. (The bison also resembles the ox in all its
¡nternal parts).
With all animals that are furnished with these parts, the parts are similarly
situated, and with the exception of man, the heart is in the middle; in man,
however, as has been observed, the heart is placed a little to the left-hand
side. In all animals the pointed end of the heart turns frontwards; only in fish it
would at first sight seem otherwise, for the pointed end is turned not towards
the breast, but towards the head and the mouth. And (in fish) the apex is
attached to a tube just where the right and left gills meet together. There are
other ducts extending from the heart to each of the gills, greater in the greater
fish, lesser in the lesser; but in the large fishes the duct at the pointed end of the
heart is a tube, white-coloured and exceedingly thick. Fishes in some few cases
have an oesophagus, as the conger and the eel; and in these the organ is small.
In fishes that are furnished with an undivided liver, the organ lies entirely on the
right side; where the liver is cloven from the root, the larger half of the organ is
on the right side: for in some fishes the two parts are detached from one
another, without any coalescence at the root, as is the case with the dogfish.
And there is also a species of haré in what is named the Fig district, near Lake
Bolbe, and elsewhere, which animal might be taken to have two livers owing to
the length of the connecting ducts, similar to the structure in the lung of birds.
The spleen in all cases, when normally placed, is on the left-hand side, and the
kidneys also lie in the same position in all creatures that possess them. There
have been known instances of quadrupeds under dissection, where the spleen
was on the right hand and the liver on the left; but all such cases are regarded
as supernatural.
In all animals the wind-pipe extends to the lung, and the manner how, we shall
discuss hereafter; and the oesophagus, in all that have the organ, extends
through the midriff into the stomach. For, by the way, as has been observed,
most fishes have no oesophagus, but the stomach is united directly with the
mouth, so that in some cases when big fish are pursuing little ones, the stomach
tumbles forward into the mouth.
All the afore-mentioned animals have a stomach, and one similarly situated,
that is to say, situated directly under the midriff; and they have a gut connected
therewith and closing at the outlet of the residuum and at what is termed the
'rectum'. However, animals present diversities in the structure of their stomachs.
In the first place, of the viviparous quadrupeds, such of
the horned animals as are not equally furnished with teeth ¡n both jaws are
furnished with four such chambers. These animals, by the way, are those that
are said to chew the cud. In these animals the oesophagus extends from the
mouth downwards along the lung, from the midriff to the big stomach (or
paunch); and this stomach is rough inside and semi-partitioned. And connected
with it near to the entry of the oesophagus is what from its appearance is termed
the ‘reticulum’ (or honeycomb bag); for outside it is like the stomach, but inside
it resembles a netted cap; and the reticulum is a great deal smaller than the
stomach. Connected with this is the ‘echinus’ (or many-plies), rough inside and
laminated, and of about the same size as the reticulum. Next after this comes
what is called the ‘enystrum’ (or abomasum), larger an longer than the echinus,
furnished inside with numerous folds or ridges, large and smooth. After all this
comes the gut.
Such is the stomach of those quadrupeds that are horned and have an
unsymmetrical dentition; and these animals differ one from another in the
shape and size of the parts, and in the fact of the oesophagus reaching the
stomach centralwise in some cases and sideways in others. Animals that are
furnished equally with teeth in both jaws have one stomach; as man, the pig,
the dog, the bear, the lion, the wolf. (The Thos, by the by, has all its internal
organs similar to the wolf's.)
All these, then have a single stomach, and after that the gut; but the stomach in
some is comparatively large, as in the pig and bear, and the stomach of the pig
has a few smooth folds or ridges; others have a much smaller stomach, not
much bigger than the gut, as the lion, the dog, and man. In the other animals the
shape of the stomach varíes in the direction of one or other of those already
mentioned; that is, the stomach in some animals resembles that of the pig; in
others that of the dog, alike with the larger animals and the smaller ones. In all
these animals diversities occur in regard to the size, the shape, the thickness or
the thinness of the stomach, and also in regard to the place where the
oesophagus opens into it.
There is also a difference in structure in the gut of the two groups of animals
above mentioned (those with unsymmetrical and those with symmetrical
dentition) in size, in thickness, and in foldings.
The intestines in those animals whose jaws are unequally furnished with teeth
are in all cases the larger, for the animals themselves are larger than those in the
other category; for very few of them are small, and no single one of the horned
animals is very small. And some possess appendages (or caeca) to the gut, but
no animal that has not incisors in both jaws has a straight gut.
The elephant has a gut constricted into chambers, so constructed that the animal
appears to have four stomachs; in it the food is found, but there is no distinct
and separate receptacle. Its viscera resemble those of the pig, only that the liver
is four times the size of that of the ox, and the other viscera in like proportion,
while the spleen is comparatively small.
Much the same may be predicated of the properties of the stomach and the gut
in oviparous quadrupeds, as in the land tortoise, the turtle, the lizard, both
crocodiles, and, in fact, in all animals of the like kind; that is to say, their
stomach is one and simple, resembling in some cases that of the pig, and in
other cases that of the dog.
The serpent genus is similar and in almost all respects furnished similarly to the
saurians among land animals, if one could only imagine these saurians to be
increased in length and to be devoid of legs. That is to say, the serpent is coated
with tessellated scutes, and resembles the saurian in its back and belly; only, by
the way, it has no testicles, but, like fishes, has two ducts converging into one,
and an ovary long and bifúrcate. The rest of its internal organs are identical with
those of the saurians, except that, owing to the narrowness and length of the
animal, the viscera are correspondingly narrow and elongated, so that they are
apt to escape recognition from the similarities in shape. Thus, the windpipe of
the creature is exceptionally long, and the oesophagus is longer still, and the
windpipe commences so cióse to the mouth that the tongue appears to be
underneath it; and the windpipe seems to project over the tongue, owing to the
fact that the tongue draws back into a sheath and does not remain in its place as
in other animals. The tongue, moreover, is thin and long and black, and can be
protruded to a great distance. And both serpents and saurians have this
altogether exceptional property in the tongue, that it is forked at the outer
extremity, and this property is the more marked in the serpent, for the tips
of his tongue are as thin as hairs. The seal, also, by the way, has a split
tongue.
The stomach of the serpent is like a more spacious gut, resembling the stomach
of the dog; then comes the gut, long, narrow, and single to the end. The heart is
situated cióse to the pharynx, small and kidney-shaped; and for this reason the
organ might in some cases appear not to have the pointed end turned towards
the breast. Then comes the lung, single, and articulated with a membranous
passage, very long, and quite detached from the heart. The liver is long and
simple; the spleen is short and round: as is the case in both respects with the
saurians. Its gall resembles that of the fish; the water-snakes have it beside the
liver, and the other snakes have it usually beside the gut. These creatures are all
saw-toothed. Their ribs are as numerous as the days of the month; in other
words, they are thirty in numbcr.
Some affirm that the same phenomenon is observable with serpents as with
swallow chicks; in other words, they say that if you prick out a serpent's eyes
they will grow again. And further, the tails of saurians and of serpents, if they
be cut off, will grow again.
With fishes the properties of the gut and stomach are similar; that is, they have
a stomach single and simple, but variable in shape according to species. For in
some cases the stomach is gut-shaped, as with the scarus, or parrot-fish; which
fish, by the way, appears to be the only fish that chews the cud. And the whole
length of the gut is simple, and if it have a reduplication or kink it loosens out
again into a simple form.
An exceptional property in fishes and in birds for the most part is the being
furnished with gut-appendages or caeca. Birds have them low down and few in
number. Fishes have them high up about the stomach, and sometimes
numerous, as in the goby, the gáleos, the perch, the scorpaena, the citharus, the
red mullet, and the sparus; the cestreus or grey mullet has several of them on
one side of the belly, and on the other side only one. Some fish possess these
appendages but only in small numbers, as the hepatus and the glaucus; and, by
the way, they are few also in the dorado. These fishes differ also from one
another within the same species, for in the
dorado one individual has many and another few. Some fishes are entirely
without the part, as the maj'ority of the selachians. As for all the rest, some of
them have a few and some a great many. And ¡n all cases where the gut-
appendages are found in fish, they are found cióse up to the stomach.
In regard to their internal parts birds differ from other animals and from one
another. Some birds, for instance, have a crop in front of the stomach, as the
barn-door cock, the cushat, the pigeon, and the partridge; and the crop consists
of a large hollow skin, into which the food first enters and where it lies ingested.
Just where the crop leaves the oesophagus it is somewhat narrow; by and by it
broadens out, but where it communicates with the stomach it narrows down
again. The stomach (or gizzard) in most birds is fleshy and hard, and inside is a
strong skin which comes away from the fleshy part. Other birds have no crop,
but instead of it an oesophagus wide and roomy, either all the way or in the part
leading to the stomach, as with the daw, the raven, and the carrion-crow. The
quail also has the oesophagus widened out at the lower extremity, and in the
aegocephalus and the owl the organ is slightly broader at the bottom than at the
top. The duck, the goose, the gull, the catarrhactes, and the great bustard have
the oesophagus wide and roomy from one end to the other, and the same applies
to a great many other birds. In some birds there is a portion of the stomach that
resembles a crop, as in the kestrel. In the case of small birds like the swallow
and the sparrow neíther the oesophagus ñor the crop is wide, but the stomach is
long. Some few have neither a crop ñor a dilated oesophagus, but the latter is
exceedingly long, as in long necked birds, such as the porphyrio, and, by the
way, in the case of all these birds the excrement is unusually moist. The quail is
exceptional in regard to these organs, as compared with other birds; in other
words, it has a crop, and at the same time its oesophagus is wide and spacíous in
front of the stomach, and the crop is at some distance, relatively to its size, from
the oesophagus at that part.
Further, in most birds, the gut is thin, and simple when loosened out. The gut-
appendages or caeca in birds, as has been observed, are few in number, and are
not situated high up, as in fishes, but low down towards the extremity of the gut.
Birds, then, have caeca-not all, but the greater part of
them, such as the barn-door cock, the partridge, the duck, the night-raven, (the
localus,) the ascalaphus, the goose, the swan, the great bustard, and the owl.
Some of the little birds also have these appendages; but the caeca in their case
are exceedingly minute, as in the sparrow.
BOOK3
Now that we have stated the magnitudes, the properties, and the relative
dífferences of the other internal organs, it remains for us to treat of the organs
that contribute to generation. These organs in the female are in all cases
internal; in the male they present numerous diversities.
In the blooded animals some males are altogether devoid of testicles, and some
have the organ but situated internally; and of those males that have the organ
internally situated, some have it cióse to the loin in the neighbourhood of the
kidney and others cióse to the belly. Other males have the organ situated
externally. In the case of these last, the penis is in some cases attached to the
belly, whilst in others it is loosely suspended, as is the case also with the
testicles; and, in the cases where the penis is attached to the belly, the
attachment varíes accordingly as the animal is emprosthuretic or opisthuretic.
No fish is furnished with testicles, ñor any other creature that has gills, ñor any
serpent whatever: ñor, in short, any animal devoid of feet, save such only as are
viviparous within themselves. Birds are furnished with testicles, but these are
internally situated, cióse to the loin. The case is similar with oviparous
quadrupeds, such as the lizard, the tortoise and the crocodile; and among the
viviparous animals this peculiarity is found in the hedgehog. Others among
those creatures that have the organ internally situated have it cióse to the belly,
as is the case with the dolphin amongst animals devoid of feet, and with the
elephant among viviparous quadrupeds. In other cases these organs are
externally conspicuous.
We have already alluded to the diversities observed in the attachment of these
organs to the belly and the adjacent región; in other words, we have stated that
in some cases the testicles are tightly fastened back, as in the pig and its allies,
and that in others they are freely suspended, as in man.
Fishes, then, are devoid of testicles, as has been stated, and serpents also. They
are furnished, however, with two ducts connected with the midriff and running
on to either side of the backbone, coalescing into a single duct above the outlet
of the residuum, and by 'above' the outlet I mean the región near to the spine.
These ducts in the rutting season get filled with the genital fluid, and, if the
ducts be squeezed, the sperm oozes out white in colour. As to the differences
observed in male fishes of diverse species, the reader should consult my treatise
on Anatomy, and the subject will be hereafter more fully discussed when we
describe the specific character in each case.
The males of oviparous animals, whether biped or quadruped, are in all cases
furnished with testicles cióse to the loin underneath the midriff. With some
animals the organ is whitish, in others somewhat of a sallow hue; in all cases it
is entirely enveloped with minute and delicate veins. From each of the two
testicles extends a duct, and, as in the case of fishes, the two ducts coalesce into
one above the outlet of the residuum. This constitutes the penis, which organ in
the case of small ovípara is inconspicuous; but in the case of the larger ovípara,
as in the goose and the like, the organ becomes quite visible just after
copulation.
The ducts in the case of fishes and in biped and quadruped ovípara are attached
to the loin under the stomach and the gut, in betwixt them and the great vein,
from which ducts or blood-vessels extend, one to each of the two testicles. And
just as with fishes the male sperm is found in the seminal ducts, and the ducts
become plainly visible at the rutting season and in some instances become
invisible after the season is passed, so also is it with the testicles of birds;
before the breeding season the organ is small in some birds and quite invisible
in others, but during the season the organ in all cases is greatly enlarged. This
phenomenon is remarkably illustrated in the ring-dove and the partridge, so
much so that some people are actually of opinion that these birds are devoid of
the organ in the winter-time.
Of male animals that have their testicles placed frontwards, some have them
inside, cióse to the belly, as the dolphin; some have them outside, exposed to
view, cióse to the lower extremity of the belly. These animals resemble one
another thus far in respect to this organ; but they differ from
one another in this fact, that some of them have their testicles situated
separately by themselves, while others, which have the organ situated
externally, have them enveloped in what is termed the scrotum.
Again, in all viviparous animals furnished with feet the following properties are
observed in the testicles themselves. From the aorta there extend vein- like
ducts to the head of each of the testicles, and another two from the kidneys;
these two from the kidneys are supplied with blood, while the two from the
aorta are devoid of it. From the head of the testicle alongside of the testicle
itself is a duct, thicker and more sinewy than the other just alluded to-a duct
that bends back again at the end of the testicle to its head; and from the head of
each of the two testicles the two ducts extend until they coalesce in front at the
penis. The duct that bends back again and that which is in contact with the
testicle are enveloped in one and the same membrane, so that, until you draw
aside the membrane, they present all the appearance of being a single
undifferentiated duct. Further, the duct in contact with the testicle has its moist
content qualified by blood, but to a comparatively less extent than in the case
of the ducts higher up which are connected with the aorta; in the ducts that
bend back towards the tube of the penis, the liquid is white-coloured. There
also runs a duct from the bladder, opening into the upper part of the canal,
around which lies, sheathwise, what is called the ‘penis'.
All these descriptive particulars may be regarded by the light of the
accompanying diagram; wherein the letter A marks the starting-point of the
ducts that extend from the aorta; the letters KK mark the heads of the testicles
and the ducts descending thereunto; the ducts extending from these along the
testicles are marked MM; the ducts turning back, in which is the white fluid,
are marked BB; the penis D; the bladder E; and the testicles XX.
(By the way, when the testicles are cut off or removed, the ducts draw upwards
by contraction. Moreover, when male animals are young, their owner
sometimes destroys the organ in them by attrition; sometimes they castrate
them at a later period. And I may here add, that a bull has been known to serve
a cow immediately after castration, and actually to imprégnate her.)
So much then for the properties of testicles in male animals.
In female animals furnished with a womb, the womb is not in all cases the same
in form or endowed with the same properties, but both in the vivípara and the
ovípara great diversities present themselves. In all creatures that have the womb
cióse to the genitals, the womb is two-horned, and one horn lies to the right-
hand side and the other to the left; its commencement, however, is single, and
so is the orífice, resembling in the case of the most numerous and largest
animals a tube composed of much flesh and gristle.
Of these parts one is termed the hystera or delphys, whence is derived the word
adelphos, and the other part, the tube or orífice, is termed metra. In all biped or
quadruped vivípara the womb is in all cases below the mídriff, as in man, the
dog, the pig, the horse, and the ox; the same is the case also in all horned
animals. At the extremity of the so-called ceratia, or horns, the wombs of most
animals have a twist or convolution.
In the case of those ovípara that lay eggs externally, the wombs are not in all
cases similarly situated. Thus the wombs of birds are cióse to the mídriff, and
the wombs of fishes down below, just like the wombs of bíped and quadruped
vivípara, only that, in the case of the fish, the wombs are delicately formed,
membranous, and elongated; so much so that in extremely small fish, each of
the two bifurcated parts looks like a single egg, and those fishes whose egg is
described as crumbling would appear to have inside them a pair of eggs,
whereas in reality each of the two sides consists not of one but of many eggs,
and this accounts for their breaking up into so many particles.
The womb of birds has the lower and tubular portion fleshy and firm, and the
part cióse to the midriff membranous and exceedingly thin and fine: so thin
and fine that the eggs might seem to be outside the womb altogether. In the
larger birds the membrane is more distinctly visible, and, if inflated through
the tube, lifts and swells out; in the smaller birds all these parts are more
indistinct.
The properties of the womb are similar in oviparous quadrupeds, as the
tortoise, the lizard, the frog and the like; for the tube below is single and
fleshy, and the cleft portion with the eggs is at the top cióse to the midriff.
With animals devoid of feet that are internally oviparous and viviparous
externally, as is the case with the dogfish and the other so-called Selachians (and
by this title we desígnate such creatures destitute of feet and furnished with gills
as are viviparous), with these animals the womb is bifúrcate, and beginning down
below it extends as far as the midriff, as in the case of birds. There is also a
narrow part between the two horns running up as far as the midriff, and the eggs
are engendered here and above at the origin of the midriff; afterwards they pass
into the wider space and turn from eggs into young animals. However, the
differences in respect to the wombs of these fishes as compared with others of
their own species or with fishes in general, would be more satisfactorily studied
in their various forms in specimens under dissection.
The members of the serpent genus also present divergencies either when
compared with the above-mentioned creatures or with one another. Serpents as a
rule are oviparous, the viper being the only viviparous member of the genus. The
viper is, previously to external parturition, oviparous internally; and owing to this
perculiarity the properties of the womb in the viper are similar to those of the
womb in the selachians. The womb of the serpent is long, in keeping with the
body, and starting below from a single duct extends continuously on both sides
of the spine, so as to give the impression of thus being a separate duct on each
side of the spine, until it reaches the midriff, where the eggs are engendered in a
row; and these eggs are laid not one by one, but all strung together. (And all
animals that are viviparous both internally and externally have the womb situated
above the stomach, and all the ovípara underneath, near to the loin. Animals that
are viviparous externally and internally oviparous present an intermedíate
arrangement; for the underneath portion of the womb, in which the eggs are, is
placed near to the loin, but the part about the orífice is above the gut.)
Further, there is the following diversity observable in wombs as compared with
one another: namely that the females of horned nonambidental animals are
furnished with cotyledons in the womb when they are pregnant, and such is the
case, among ambidentals, with the haré, the mouse, and the bat; whereas all other
animals that are ambidental, viviparous, and furnished
with feet, have the womb quite smooth, and in their case the attachment of the
embryo is to the womb itself and not to any cotyledon inside it.
The parts, then, in animals that are not homogeneous with themselves and
uniform in their texture, both parts external and parts internal, have the
properties above assigned to them.
In sanguineous animals the homogeneous or uniform part most universally
found is the blood, and its habitat the vein; next in degree of universality, their
analogues, lymph and fibre, and, that which chiefly constitutes the frame of
animals, flesh and whatsoever in the several parts is analogous to flesh; then
bone, and parts that are analogous to bone, as fish-bone and gristle; and then,
again, skin, membrane, sinew, hair, nails, and whatever corresponds to these;
and, furthermore, fat, suet, and the excretions: and the excretions are dung,
phlegm, yellow bile, and black bile.
Now, as the nature of blood and the nature of the veíns have all the appearance
of being primitive, we must discuss their properties first of all, and all the more
as some previous writers have treated them very unsatisfactoríly. And the cause
of the ignorance thus manifested is the extreme difficulty experienced in the
way of observation. For in the dead bodies of animals the nature of the chief
veins is undiscoverable, owing to the fact that they collapse at once when the
blood leaves them; for the blood pours out of them in a stream, like liquid out
of a vessel, since there is no blood separately situated by itself, except a little in
the heart, but it is all lodged in the veins. In living animals it is impossíble to
inspect these parts, for of their very nature they are situated inside the body and
out of sight. For this reason anatomists who have carried on their investigations
on dead bodies in the dissecting room have failed to discover the chief roots of
the veins, while those who have narrowly inspected bodies of living men
reduced to extreme attenuation have arrived at conclusions regarding the origin
of the veins from the manifestations visible externally. Of these investigators,
Syennesis, the physician of Cyprus, writes as follows:—
‘The big veins run thus:-from the navel across the loins, along the back, past the
lung, in under the breasts; one from right to left, and the other from left to right;
that from the left, through the liver to the kidney and the testicle, that from the
right, to the spleen and kidney and testicle, and from thence to the penis.’
Diogenes of Apollonia writes thus:—
‘The veins in man are as follows:-There are two veins pre-eminent in
magnitude. These extend through the belly along the backbone, one to right,
one to left; either one to the leg on its own side, and upwards to the head, past
the collar bones, through the throat. From these, veins extend all over the body,
from that on the right hand to the right side and from that on the left hand to the
left side; the most important ones, two in number, to the heart in the región of
the backbone; other two a little higher up through the chest in underneath the
armpit, each to the hand on its side: of these two, one being termed the vein
splenitis, and the other the vein hepatitis. Each of the pair splits at its extremity;
the one branches in the direction of the thumb and the other in the direction of
the palm; and from these run off a number of minute veins branching off to the
fingers and to all parts of the hand. Other veins, more minute, extend from the
main veins; from that on the right towards the liver, from that on the left
towards the spleen and the kidneys. The veins that run to the legs split at the
juncture of the legs with the trunk and extend right down the thigh. The largest
of these goes down the thigh at the back of it, and can be discerned and traced
as a big one; the second one runs inside the thigh, not quite as big as the one
just mentioned. After this they pass on along the knee to the shin and the foot
(as the upper veins were described as passing towards the hands), and arrive at
the solé of the foot, and from thence continué to the toes. Moreover, many
delicate veins separate off from the great veins towards the stomach and
towards the ribs.
‘The veins that run through the throat to the head can be discerned and traced
in the neck as large ones; and from each one of the two, where it terminates,
there branch off a number of veins to the head; some from the right side
towards the left, and some from the left side towards the right; and the two
veins termínate near to each of the two ears. There is another pair of veins in
the neck running along the big vein on either side, slightly
less in size than the pair just spoken of, and with these the greater part of the
veins in the head are connected. This other pair runs through the throat inside;
and from either one of the two there extend veins in underneath the shoulder
blade and towards the hands; and these appear alongside the veins splenitis and
hepatitis as another pair of veins smaller in size. When there is a pain near the
surface of the body, the physician lances these two latter veins; but when the
pain is within and in the región of the stomach he lances the veins splenitis and
hepatitis. And from these, other veins depart to run below the breasts.
‘There is also another pair running on each side through the spinal marrow to
the testicles, thin and delicate. There is, further, a pair running a little
underneath the cuticle through the flesh to the kidneys, and these with men
termínate at the testicle, and with women at the womb. These veins are termed
the spermatic veins. The veins that leave the stomach are comparatively broad
just as they leave; but they become gradually thinner, until they change over
from right to left and from left to right.
‘Blood is thickest when it is imbibed by the fleshy parts; when it is transmítted
to the organs above-mentioned, it becomes thin, warm, and frothy.'
Such are the accounts given by Syennesis and Diogenes. Polybus writes to the
following effect:—
‘There are four pairs of veins. The first extends from the back of the head,
through the neck on the outside, past the backbone on either side, until it
reaches the loins and passes on to the legs, after which it goes on through the
shins to the outer side of the ankles and on to the feet. And it is on this account
that surgeons, for paíns in the back and loin, bleed in the ham and in the outer
side of the ankle. Another pair of veins runs from the head, past ears, through
the neck; which veins are termed the jugular veins. This pair goes on inside
along the backbone, past the muscles of the loins, on to the testicles, and
onwards to the thighs, and through the inside of the hams and
through the shins down to the inside of the ankles and to the feet; and for this
reason, surgeons, for pains in the muscles of the loins and in the testicles, bleed
on the hams and the inner side of the ankles. The third pair extends from the
temples, through the neck, ¡n underneath the shoulder- blades, into the lung;
those from right to left going ¡n underneath the breast and on to the spleen and
the kidney; those from left to right running from the lung in underneath the breast
and into the liver and the kidney; and both termínate in the fundament. The fourth
pair extend from the front part of the head and the eyes in underneath the neck
and the collar-bones; from thence they stretch on through the upper part of the
upper arms to the elbows and then through the fore-arms on to the wrists and the
jointings of the fingers, and also through the lower part of the upper-arms to the
armpits, and so on, keeping above the ribs, until one of the pair reaches the
spleen and the other reaches the liver; and after this they both pass over the
stomach and termínate at the penis/
The above quotatíons sum up pretty well the statements of all previous writers.
Furthermore, there are some writers on Natural History who have not ventured to
lay down the law in such precise terms as regards the veins, but who all alike
agree in assigning the head and the brain as the starting- point of the veins. And
in this opinion they are mistaken.
The investigation of such a subject, as has been remarked, is one fraught with
difficulties; but, if any one be keenly interested in the matter, his best plan will be
to allow his animals to starve to emaciation, then to strangle them on a sudden,
and thereupon to prosecute his investigations.
We now proceed to give particulars regarding the properties and functions of the
veins. There are two blood-vessels in the thorax by the backbone, and lying to its
inner side; and of these two the larger one is situated to the front, and the lesser
one is to the rear of it; and the larger is situated rather to the right hand side of the
body, and the lesser one to the left; and by some this vein is termed the ‘aorta',
from the fact that even in dead bodies part of it is observed to be full of air. These
blood-vessels have their origins in the heart, for they traverse the other viscera, in
whatever direction they happen to run, without in any way losing their distinctive
characteristic as blood-vessels, whereas the heart is as it were a part of them (and
that too
more ¡n respect to the frontward and larger one of the two), owing to the fact
that these two veins are above and below, with the heart lying midway.
The heart ¡n all animals has cavítíes inside it. In the case of the smaller animals
even the largest of the chambers is scarcely discernible; the second larger is
scarcely discernible in animals of médium size; but in the largest animals all
three chambers are distinctly seen. In the heart then (with its pointed end
directed frontwards, as has been observed) the largest of the three chambers is
on the right-hand side and highest up; the least one is on the left-hand side; and
the medium-sized one lies in betwixt the other two; and the largest one of the
three chambers is a great deal larger than either of the two others. All three,
however, are connected with passages leading in the direction of the lung, but
all these Communications are indistinctly discernible by reason of their
minuteness, except one.
The great blood-vessel, then, is attached to the biggest of the three chambers,
the one that lies uppermost and on the right-hand side; it then extends right
through the chamber, coming out as blood-vessel again; just as though the
cavity of the heart were a part of the vessel, in which the blood broadens its
channel as a river that widens out in a lake. The aorta is attached to the middle
chamber; only, by the way, it is connected with it by much narrower pipe.
The great blood-vessel then passes through the heart (and runs from the heart
into the aorta). The great vessel looks as though made of membrane or skin,
while the aorta is narrower than it, and is very sinewy; and as it stretches away
to the head and to the lower parts it becomes exceedingly narrow and sinewy.
First of all, then, upwards from the heart there stretches a part of the great
blood-vessel towards the lung and the attachment of the aorta, a part consisting
of a large undivided vessel. But there split off from it two parts; one towards the
lung and the other towards the backbone and the last vertebra of the neck.
The vessel, then, that extends to the lung, as the lung itself is duplícate,
divides at first into two; and then extends along by every pipe and every
perforation, greater along the greater ones, lesser along the less, so
continuously that it is impossible to discern a single part wherein there is not
perforation and vein; for the extremities are indistinguishable from their
minuteness, and in point of fact the whole lung appears to be filled with blood.
The branches of the blood-vessels lie above the tubes that extend from the
windpipe. And that vessel which extends to the vertebra of the neck and the
backbone, stretches back again along the backbone; as Homer represents in the
lines:—
(Antilochus, as Thoon turned him round),
Transpierc'd his back with a dishonest wound;
The hollow vein that to the neck extends,
Along the chine, the eager javelin rends.
From this vessel there extend small blood-vessels at each rib and each vertebra;
and at the vertebra above the kidneys the vessel bifurcates. And in the above way
the parts branch off from the great blood-vessel.
But up above all these, from that part which is connected with the heart, the
entire vein branches off in two directions. For its branches extend to the sides
and to the collarbones, and then pass on, in men through the armpits to the arms,
in quadrupeds to the forelegs, in birds to the wings, and in fishes to the upper or
pectoral fins. (See diagram.) The trunks of these veins, where they first branch
off, are called the 'jugular' veins; and, where they branch off to the neck the great
vein run alongside the windpipe; and, occasionally, if these veins are pressed
externally, men, though not actually choked, become insensible, shut their eyes,
and fall fíat on the ground. Extending in the way described and keeping the
windpipe in betwixt them, they pass on until they reach the ears at the junction of
the lower jaw with the skull. Henee again they branch off into four veins, of
which one bends back and descends through the neck and the shoulder, and
meets the previous branching off of the vein at the bend of the arm, while the rest
of it terminates at the hand and fingers. (See diagram.)
Each vein of the other pair stretches from the región of the ear to the brain, and
branches off in a number of fine and delicate veins into the so-called meninx, or
membrane, which surrounds the brain. The brain itself in all
animals is destitute of blood, and no vein, great or small, holds its course
therein. But of the remaining veins that branch off from the last mentioned vein
some envelop the head, others cióse their courses ¡n the organs of sense and at
the roots of the teeth in veins exceedingly fine and minute.
And in like manner the parts of the lesser one of the two chief blood-vessels,
designated the aorta, branch off, accompanying the branches from the big vein;
only that, in regard to the aorta, the passages are less in size, and the branches
very considerably less than are those of the great vein. So much for the veins as
observed in the regions above the heart.
The part of the great vein that lies underneath the heart extends, freely
suspended, right through the midriff, and is united both to the aorta and the
backbone by slack membranous Communications. From it one vein, short and
wide, extends through the liver, and from it a number of minute veins branch
off into the liver and disappear. From the vein that passes through the liver two
branches separate off, of which one terminates in the diaphragm or so-called
midriff, and the other runs up again through the armpit into the right arm and
unites with the other veins at the inside of the bend of the arm; and it is in
consequence of this local connexion that, when the surgeon opens this vein in
the forearm, the patient is relieved of certain pains in the liver; and from the
left-hand side of it there extends a short but thick vein to the spleen and the
little veins branching off it disappear in that organ. Another part branches off
from the left-hand side of the great vein, and ascends, by a course similar to the
course recently described, into the left arm; only that the ascending vein in the
one case is the vein that traverses the liver, while in this case it is distinct from
the vein that runs into the spleen. Again, other veins branch off from the big
vein; one to the omentum, and another to the pancreas, from which vein run a
number of veins through the mesentery. All these veins coalesce in a single
large vein, along the entire gut and stomach to the oesophagus; about these
parts there is a great ramification of branch veins.
As far as the kidneys, each of the two remaining undivided, the aorta and the
big vein extend; and here they get more closely attached to the
backbone, and branch off, each of the two, into a A shape, and the big vein gets
to the rear of the aorta. But the chief attachment of the aorta to the backbone
takes place ¡n the región of the heart; and the attachment is effected by means of
minute and sinewy vessels. The aorta, just as it draws off from the heart, is a
tube of considerable volume, but, as it advances in its course, it gets narrower
and more sinewy. And from the aorta there extend veins to the mesentery just
like the veins that extend thither from the big vein, only that the branches in the
case of the aorta are considerably less in magnitude; they are, indeed, narrow
and fibrillar, and they end in delicate hollow fibre-like veinlets.
There is no vessel that runs from the aorta into the liver or the spleen.
From each of the two great blood-vessels there extend branches to each of the
two flanks, and both branches fasten on to the bone. Vessels also extend to the
kidneys from the big vein and the aorta; only that they do not open into the
cavity of the organ, but their ramifications penetrate into its substance. From the
aorta run two other ducts to the bladder, firm and continuous; and there are
other ducts from the hollow of the kidneys, in no way communícatíng with the
big vein. From the centre of each of the two kidneys springs a hollow sinewy
vein, running along the backbone right through the loins; by and by each of the
two veins first disappears in its own flank, and soon afterwards reappears
stretching in the direction of the flank. The extremities of these attach to the
bladder, and also in the male to the penis and in the female to the womb. From
the big vein no vein extends to the womb, but the organ is connected with the
aorta by veins numerous and closely packed.
Furthermore, from the aorta and the great vein at the points of divarication there
branch off other veins. Some of these run to the groins-large hollow veins-and
then pass on down through the legs and termínate in the feet and toes. And,
again, another set run through the groins and the thighs cross- garter fashion,
from right to left and from left to right, and unite in the hams with the other
veins.
In the above description we have thrown light upon the course of the veins and
their points of departure.
In all sanguineous animals the case stands as here set forth ¡n regard to the
points of departure and the courses of the chief veins. But the description does
not hold equally good for the entire vein-system in all these animals. For, in
point of fact, the organs are not identically situated in them all; and, what is
more, some animals are furnished with organs of which other animals are
destitute. At the same time, while the description so far holds good, the proof of
its accuracy is not equally easy in all cases, but is easiest in the case of animals
of considerable magnitude and supplied abundantly with blood. For in little
animals and those scantily supplied with blood, either from natural and inherent
causes or from a prevalence of fat in the body, thorough accuracy in
investigaron is not equally attainable; for in the latter of these creatures the
passages get clogged, like water-channels choked with slush; and the others
have a few minute fibres to serve instead of veins. But in all cases the big vein
is plainly discernible, even in creatures of insignificant size.
The sinews of animals have the following properties. For these also the point of
origin is the heart; for the heart has sinews within itself in the largest of its three
chambers, and the aorta is a sinew-like vein; in fact, at its extremity it is
actually a sinew, for it is there no longer hollow, and is stretched like the
sinews where they termínate at the jointings of the bones. Be it remembered,
however, that the sinews do not proceed in unbroken sequence from one point
of origin, as do the blood-vessels.
For the veins have the shape of the entire body, like a sketch of a mannikin; in
such a way that the whole frame seems to be filled up with little veins in
attenuated subjects-forthe space occupied by flesh in fat individuáis is filled
with little veins in thin ones-whereas the sinews are distributed about the joints
and the flexures of the bones. Now, if the sinews were derived in unbroken
sequence from a common point of departure, this continuity would be
discernible in attenuated specimens.
In the ham, or the part of the frame brought into full play in the effort of
leaping, is an important system of sinews; and another sinew, a double one,
is that called ‘the tendón', and others are those brought into play when a great
effort of physical strength is required; that is to say, the epitonos or back-stay
and the shoulder-sinews. Other sinews, devoid of specifíc designation, are
situated in the región of the flexures of the bones; for all the bones that are
attached to one another are bound together by sinews, and a great quantity of
sinews are placed in the neighbourhood of all the bones. Only, by the way, in
the head there is no sinew; but the head is held together by the sutures of the
bones.
Sinew is fissile lengthwise, but crosswise it is not easily broken, but admits of a
considerable amount of hard tensión. In connexion with sinews a liquid mucus
is developed, white and glutinous, and the organ, in fact, is sustained by it and
appears to be substantially composed of it. Now, vein may be submitted to the
actual cautery, but sinew, when submitted to such action, shrivels up altogether;
and, if sinews be cut asunder, the severed parts wíll not again cohere. A feeling
of numbness is incidental only to parts of the frame where sinew is situated.
There is a very extensive system of sinews connected severally with the feet,
the hands, the ribs, the shoulder-blades, the neck, and the arms.
All anímals supplied with blood are furnished with sinews; but in the case of
animals that have no flexures to their limbs, but are, in fact, destitute of either
feet or hands, the sinews are fine and inconspicuous; and so, as might have been
anticipated, the sinews in the fish are chiefly discernible in connexion with the
fin.
The ínes (or fibrous connective tissue) are a something intermedíate between
sinew and vein. Some of them are supplied with fluid, the lymph; and they pass
from sinew to vein and from vein to sinew. There is another kind of ines or fibre
that is found in blood, but not in the blood of all animals alike. If this fibre be
left in the blood, the blood wíll coagúlate; if it be removed or extracted, the
blood is found to be incapable of coagulation. While, however, this fibrous
matter is found in the blood of the great